N30.00 - Acute Cystitis Without Hematuria

Short Description

N30.00: Use for acute bladder infection (cystitis) when the patient does NOT have blood in the urine - this is the most common uncomplicated UTI code for bladder infections presenting with dysuria, frequency, urgency, and suprapubic pain but NO hematuria (no blood in urine, either visible or microscopic).

Full Description & Clinical Context

N30.00 - Acute cystitis without hematuria describes acute inflammation of the bladder (cystitis) typically caused by bacterial infection, presenting with classic UTI symptoms but without any evidence of blood in the urine.

Key Clinical Features:

Dysuria - painful, burning urination
Frequency - need to urinate frequently
Urgency - strong, immediate urge to void
Suprapubic discomfort - lower abdominal/pelvic pain
Cloudy or foul-smelling urine
NO hematuria - no blood in urine (key distinction from N30.01)
No systemic symptoms - no fever, chills, or flank pain (which would suggest pyelonephritis)

Common causative organisms:

Escherichia coli (E. coli) - 80-90% of cases
Staphylococcus saprophyticus
Klebsiella pneumoniae
Proteus mirabilis
Enterococcus species

Pathophysiology: Bacteria (usually from GI tract) ascend through urethra → colonize bladder → cause inflammation of bladder mucosa → acute symptoms develop over hours to days.

Code Details

Code set: ICD-10-CM
Full code: N30.00
Title: Acute cystitis without hematuria
Code type: Billable/specific diagnosis code
Clinical category: Cystitis (bladder infection)
Parent code: N30.0 (Acute cystitis)

Coding notes from N30:

Use additional code to identify infectious agent (B95-B97) when organism identified on culture
Excludes 1:
- Prostatocystitis → N41.3
From N30.0 (parent):
- Excludes 1: Irradiation cystitis → N30.4-
- Excludes 1: Trigonitis → N30.3-

N30.x Family - Complete Cystitis Code Set

Acute vs Chronic, With vs Without Hematuria

Code	Description	When Used
N30.00	Acute cystitis WITHOUT hematuria	New/acute bladder infection, no blood in urine ← YOU ARE HERE
N30.01	Acute cystitis WITH hematuria	Acute bladder infection WITH blood in urine (visible or microscopic)
N30.10	Interstitial cystitis (chronic) without hematuria	Chronic IC/BPS, no hematuria
N30.11	Interstitial cystitis (chronic) with hematuria	Chronic IC/BPS WITH hematuria
N30.20	Other chronic cystitis without hematuria	Chronic bladder inflammation, no hematuria
N30.21	Other chronic cystitis with hematuria	Chronic bladder inflammation WITH hematuria
N30.30	Trigonitis without hematuria	Inflammation of bladder trigone, no hematuria
N30.31	Trigonitis with hematuria	Trigone inflammation WITH hematuria
N30.40	Irradiation cystitis without hematuria	Post-radiation bladder inflammation, no hematuria
N30.41	Irradiation cystitis with hematuria	Post-radiation cystitis WITH hematuria
N30.80	Other cystitis without hematuria	Other specified cystitis types, no hematuria
N30.81	Other cystitis with hematuria	Other specified cystitis WITH hematuria
N30.90	Cystitis, unspecified without hematuria	Unspecified type, no hematuria
N30.91	Cystitis, unspecified with hematuria	Unspecified type WITH hematuria

Coding Principle:

The 5th character (0 vs 1) distinguishes WITHOUT hematuria (0) from WITH hematuria (1)
Hematuria can be visible (gross) OR microscopic (positive on UA)
If urinalysis shows blood (even trace/microscopic), use the “with hematuria” code (N30.01)
If no blood detected at all, use N30.00

CRITICAL: N30.00 vs N30.01 (The Hematuria Question)

Decision Tree: Which Code to Use?

Use N30.00 when:

Patient has acute cystitis/UTI symptoms
Urinalysis shows NO blood (negative for blood)
Patient reports NO visible blood in urine
No RBCs on microscopy (or within normal limits)
Documentation says “no hematuria”

Use N30.01 when:

Patient has acute cystitis/UTI symptoms
Urinalysis shows positive for blood (even trace/1+)
Patient reports visible blood in urine (gross hematuria)
RBCs present on microscopy (elevated)
Documentation mentions hematuria at all

Common Documentation Question:

“Does ‘with hematuria’ refer to GROSS hematuria only, or microscopic too?”

Answer: The code applies to BOTH visible (gross) AND microscopic hematuria.

If the urinalysis detects blood (even occult/microscopic), code N30.01
The “with hematuria” codes (x1) capture ANY presence of blood, not just visible blood
If patient didn’t SEE blood but lab FOUND blood → still code N30.0

When to Use N30.00

Use N30.00 ONLY when ALL are true:

Acute cystitis diagnosed - provider documents “acute cystitis,” “UTI,” “bladder infection,” etc.
Classic UTI symptoms present:
- Dysuria (painful urination)
- Urinary frequency
- Urinary urgency
- Suprapubic pain/pressure
- Cloudy or foul-smelling urine
NO hematuria documented:
- Urinalysis shows no blood
- Patient reports no visible blood in urine
- No RBCs on microscopy (or normal range)
No systemic infection signs:
- No fever/chills (pyelonephritis would be N10-N12)
- No flank pain
- Not complicated UTI
Not one of the excluded types:
- Not prostatocystitis (N41.3)
- Not irradiation cystitis (N30.4-)
- Not trigonitis (N30.3-)

Typical scenario for N30.00:

“35-year-old female with dysuria, frequency, urgency x 2 days. UA: WBC 50-100, bacteria many, blood negative. Diagnosis: Acute cystitis. Rx: Bactrim DS.”

When NOT to Use N30.00

Do NOT use N30.00 when:

Scenario	Use Instead	Why
Hematuria present (visible OR microscopic)	N30.01	ANY blood in urine = “with hematuria”
Chronic/recurrent cystitis	N30.20/N30.21	Not acute; chronic inflammation
Interstitial cystitis/painful bladder	N30.10/N30.11	Specific IC/BPS diagnosis
Trigonitis specifically documented	N30.30/N30.31	Specific anatomic location
Post-radiation cystitis	N30.40/N30.41	Specific etiology (radiation)
Prostatocystitis (males)	N41.3	Prostate + bladder involvement
Pyelonephritis/kidney infection	N10/N11/N12	Upper tract, not just bladder
Asymptomatic bacteriuria	N39.0	No symptoms, just positive culture
UTI, site unspecified	N39.0	Location not documented as bladder

Documentation Requirements for N30.00

MINIMUM documentation needed to assign N30.00:

✅ MUST include:

“Acute cystitis,” “UTI,” “bladder infection,” or equivalent - provider documents the diagnosis
UTI symptoms documented:
- Dysuria, frequency, urgency, suprapubic pain
- At least 2-3 classic symptoms
NO hematuria documented:
- Urinalysis shows negative for blood
- OR explicitly states “no hematuria”
- OR no mention of blood at all
Supporting evidence:
- Urinalysis shows WBCs, bacteria, nitrites (typical UTI findings)
- Urine culture may be pending or positive

❌ CANNOT use if:

Any hematuria present (even trace) → use N30.01
Chronic/recurrent nature documented → use N30.2x
Systemic symptoms (fever, flank pain) suggest upper tract → use N10-N12

✅ SHOULD document (best practice):

Urinalysis results (WBC, bacteria, blood, nitrites, leukocyte esterase)
Urine culture results if available
Infectious organism if identified → code additionally with B95-B97
Treatment initiated (antibiotics prescribed)

Use Additional Code for Infectious Agent

ICD-10-CM instruction: “Use additional code to identify infectious agent (B95-B97)”

When the specific organism is identified (usually from urine culture), assign a secondary code:

Organism	Code	Example
E. coli	B96.20 (Unspecified E. coli) or B96.2x	Most common cause
Klebsiella	B96.1	Gram-negative rod
Proteus	B96.4	Gram-negative rod
Enterococcus	B95.2	Gram-positive cocci
Staphylococcus	B95.8	Gram-positive cocci
Pseudomonas	B96.5	Gram-negative rod

Example coding with organism:

Primary: N30.00 (Acute cystitis without hematuria)
Secondary: B96.20 (E. coli as cause)

Note: Many facilities code only N30.00 in practice and don’t routinely add B95-B97 codes unless culture results are back and provider specifically documents the organism as causative.

HCC Information

N30.00 does NOT map to a CMS-HCC - acute bladder infections are not risk-adjusted conditions
No direct HCC weight or RAF score impact
Used primarily for medical necessity, DRG assignment (if admitted), and accurate diagnosis documentation

Associated conditions that MAY have HCC:

If sepsis develops from UTI → A41.x codes → potential HCC mapping
If acute kidney injury develops → N17.x → HCC 135

RVU / wRVU Information

ICD-10-CM codes (including N30.00) do NOT carry RVUs or wRVUs
RVUs apply to CPT/HCPCS procedure codes only
N30.00 supports medical necessity for:
- E/M services (office visits, urgent care, ED visits)
- Urinalysis testing
- Urine cultures
- Antibiotic prescriptions

Typical E/M levels with N30.00:

Office visit: 99212-99214 (established) or 99202-99204 (new)
Urgent care: 99281-99284
ED visit: 99281-99284 (uncomplicated UTI)

Common CPT Procedure Pairings with N30.00

Laboratory:

81001 - Urinalysis, automated with microscopy
81002 - Urinalysis, non-automated without microscopy
81003 - Urinalysis, automated without microscopy
87086 - Urine culture, bacterial; quantitative colony count
87088 - Urine culture with colony count and sensitivity

E/M Services:

99202-99205 - Office/outpatient visit, new patient
99211-99215 - Office/outpatient visit, established patient
99281-99285 - Emergency department visit
99381-99397 - Preventive medicine services (if UTI found during wellness exam)

Procedures (less common for uncomplicated cystitis):

51701 - Insertion of bladder catheter (if retention present)
51702 - Insertion of temporary indwelling bladder catheter

Clinical Examples: When to Use N30.00

✅ Example 1 - Classic Uncomplicated UTI

SCENARIO: 
28-year-old female presents with 2 days of dysuria, frequency, urgency.
Denies fever, flank pain, or visible blood in urine.

UA Results:
- Color: Yellow, cloudy
- WBC: 50-100/hpf
- RBC: 0-2/hpf (NORMAL)
- Bacteria: Many
- Nitrites: Positive
- Blood: Negative

Assessment: Acute cystitis
Plan: Bactrim DS x 3 days

CODE: N30.00
├─ Acute cystitis documented
├─ Classic UTI symptoms present
├─ Urinalysis confirms infection (WBC, bacteria, nitrites)
├─ NO hematuria (RBC 0-2 is normal; blood negative)
└─ N30.00 is correct

✅ Example 2 - UTI with Culture Results

SCENARIO:
45-year-old female with dysuria x 3 days. UA positive for WBC, bacteria.
Urine culture grew E. coli >100,000 CFU/mL.
No hematuria noted.

Assessment: Acute cystitis due to E. coli

CODES:
- N30.00 (Acute cystitis without hematuria)
- B96.20 (E. coli as infectious agent)
├─ Primary diagnosis: N30.00
├─ Secondary: B96.20 (organism identified)
└─ "Use additional code" instruction followed

✅ Example 3 - Recurrent UTI, Acute Episode

SCENARIO:
Patient with history of recurrent UTIs now presents with NEW acute episode.
Dysuria, frequency, urgency x 1 day.
UA: WBC 100+, bacteria many, blood negative.

Assessment: Acute cystitis (acute episode of recurrent UTI)

CODE: N30.00
├─ This is an ACUTE episode (not chronic inflammation)
├─ History of recurrent UTI doesn't change acute coding
├─ No hematuria present
└─ N30.00 appropriate for THIS acute episode

❌ Example 4 - WRONG: Microscopic Hematuria Present

SCENARIO:
35-year-old female with dysuria, frequency.

UA Results:
- WBC: 50-100/hpf
- RBC: 10-25/hpf (ELEVATED)
- Blood: 2+ positive
- Bacteria: Many

Assessment: Acute cystitis

WRONG CODE: N30.00
CORRECT CODE: N30.01

WHY:
├─ Urinalysis shows BLOOD (2+ positive)
├─ RBCs elevated (10-25 is abnormal)
├─ Even though microscopic, this is hematuria
├─ Must use N30.01 (WITH hematuria), not N30.00
└─ N30.00 is ONLY for NO hematuria at all

❌ Example 5 - WRONG: Chronic Cystitis

SCENARIO:
Patient with chronic bladder pain x 6 months, recurrent UTIs.
Now presents with persistent symptoms despite multiple antibiotic courses.

Assessment: Chronic cystitis

WRONG CODE: N30.00 (this is for ACUTE)
CORRECT CODE: N30.20 or N30.21 (chronic cystitis)

WHY:
├─ Documentation says CHRONIC
├─ N30.00 is for ACUTE episodes only
├─ Persistent/chronic inflammation = N30.2x codes
└─ Check for hematuria to decide between N30.20 vs N30.21

Common Documentation Errors to AVOID

❌ Error 1: Ignoring Microscopic Hematuria on UA

WRONG: Coding N30.00 when UA shows "blood 1+" or "RBC 5-10/hpf"
├─ Even microscopic/trace hematuria = "with hematuria"
├─ Should code N30.01 instead
└─ CORRECT: Always check UA blood results before coding

✅ CORRECT: If ANY blood present → N30.01; if NO blood → N30.00

❌ Error 2: Using N30.00 for Chronic/Recurrent Cystitis

WRONG: "Patient with recurrent UTIs" coded as N30.00
├─ "Recurrent" suggests chronic pattern
├─ If documentation emphasizes chronic/persistent nature → N30.2x
├─ N30.00 is for ACUTE episodes only
└─ CORRECT: Distinguish acute episodes from chronic condition

✅ CORRECT: 
- Acute episode → N30.00/N30.01
- Chronic condition → N30.20/N30.21

❌ Error 3: Not Using Organism Code When Available

WRONG: Only coding N30.00 when culture shows specific organism
├─ Instruction says "Use additional code" for infectious agent
├─ When culture identifies organism, should add B95-B97 code
└─ CORRECT: N30.00 + B96.20 (if E. coli cultured)

✅ CORRECT: Follow "use additional code" instructions when organism known

❌ Error 4: Confusing Cystitis with Pyelonephritis

WRONG: "UTI with fever and flank pain" coded as N30.00
├─ Fever + flank pain = upper tract (kidney) infection
├─ This is pyelonephritis, not cystitis
├─ Should use N10 (acute pyelonephritis), not N30.00
└─ CORRECT: Systemic symptoms suggest kidney involvement

✅ CORRECT:
- Bladder symptoms only → N30.00/N30.01
- Kidney symptoms (fever, flank pain) → N10-N12

❌ Error 5: Using N30.00 for Asymptomatic Bacteriuria

WRONG: "Urine culture positive but patient asymptomatic" coded as N30.00
├─ No symptoms = not cystitis
├─ This is asymptomatic bacteriuria
├─ Should use N39.0 or other appropriate code
└─ CORRECT: N30.00 requires SYMPTOMS of cystitis

✅ CORRECT: 
- Symptoms + positive culture → N30.00
- No symptoms + positive culture → N39.0

Compliance Checklist

Before coding N30.00, verify:

Quick Reference Card

ICD-10-CM N30.00 - Acute Cystitis Without Hematuria
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
USE WHEN:
• Acute bladder infection diagnosed
• Classic UTI symptoms: dysuria, frequency, urgency, suprapubic pain
• Urinalysis shows infection (WBC, bacteria, nitrites)
• NO hematuria present (blood negative on UA; no visible blood)
• No systemic symptoms (no fever, no flank pain)
• Not chronic/recurrent cystitis
• Not interstitial cystitis or radiation cystitis
 
DON'T USE WHEN:
• ANY hematuria present (even trace/microscopic) → use N30.01
• Chronic cystitis → use N30.20/N30.21
• Interstitial cystitis → use N30.10/N30.11
• Pyelonephritis (kidney infection) → use N10-N12
• Asymptomatic bacteriuria → use N39.0
• Prostatocystitis → use N41.3
 
KEY DISTINCTION:
• N30.00 = WITHOUT hematuria (NO blood in urine at all)
• N30.01 = WITH hematuria (ANY blood, visible OR microscopic)
 
USE ADDITIONAL CODE:
• Add B95-B97 if organism identified on culture
• Most common: B96.20 (E. coli)
 
NOT HCC:
• No direct HCC mapping
• Supports medical necessity for E/M, labs, antibiotics
 
BOTTOM LINE:
N30.00 = acute bladder infection with NO blood in urine.
If urinalysis shows ANY blood → use N30.01 instead.
Check UA results before coding!

Last Updated: February 9, 2026
For coding reference only - always verify against the current ICD-10-CM, official guidelines, payer policies, and facility rules.
Key concept: N30.00 is for ACUTE cystitis WITHOUT hematuria; the 5th character “0” means NO blood, “1” means WITH blood. Always check urinalysis results for blood before coding.
Most common urology diagnosis code; represents uncomplicated bladder infection without complications.

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N30.00