2026 NPPES data Urology Physician NPI 1821318353 M.D.
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Diana Bowen, M.D.

Urology Physician in Chicago, Illinois. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 13,350 in Urology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
369
Medicare Part D claims · 97 beneficiaries · Urology Physician avg: 1K
Generic prescribing
66%
generic claims · 34% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$90.95
3 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Diana Bowen, M.D. filed 369 Medicare Part D claims in 2023 as a Urology Physician in Chicago, Illinois, prescribing 66% generic.

369
Part D claims, 2023
66%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.

Diana Bowen, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023, across all CMS prescribers nationally

369 Top 43% higher than 57% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2K+: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic, not verified)

Diana Bowen, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about Diana Bowen, M.D.?

Quality data not reported

NPI registry status

Active

Issued 06/07/2010

NPI 1821318353

Primary specialty

Urology Physician

Mid-sized

13,350 US NPIs in this specialty

Medicare Part D claims

369 71% vs specialty avg

2023 prescription claims

Specialty avg: 1,280

Specialty distribution in Illinois

How Urology Physician compares to other specialties among Illinois providers

Illinois providers
Clinical Social Worker - 5.2%Clinical Social Worker5.2%Physical Therapist - 5%Physical Therapist5%Mental Health Counselor - 4.5%Mental Health Counselor4.5%Speech-Language Pathologist - 4.2%Speech-Language Pathologist4.2%Student in an Organized Health Care Education/Training Program - 4.2%Student in an Organized Health Care Education/Training Program4.2%Pharmacist - 4.1%Pharmacist4.1%Urology Physician - 0.2%Urology Physician0.2%
Largest specialties in Illinois (% of in-state providers)

Board certification

Not published by CMS

CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Urology Physician. Verify directly:

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

Diana Bowen, M.D. appears in the CMS NPPES registry as a Urology Physician provider holding M.D. credentials at 225 E CHICAGO AVE, Chicago, IL, 60611, with a listed phone of (312) 227-6342. NPI 1821318353 was issued on 06/07/2010. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Bowen most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 369 prescription claims written by this provider, covering 97 Medicare beneficiaries and totaling roughly $110K in drug spend, split 34% brand-name and 66% generic by claim count. These figures capture only Medicare Part D, commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Urology Physician is a mid-sized specialty nationwide, with 13,350 enrolled providers across 54 states and an average of 1,280 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

225 E CHICAGO AVE
Chicago, IL 60611

Provider Details

NPI 1821318353
Specialty Urology Physician
Credentials M.D.
Gender Female
NPI Issued 06/07/2010

Hospital and facility affiliations

Facilities where Diana Bowen, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

Northwestern Medical Faculty Foundation
Chicago, IL

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) - CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Diana Bowen, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$91

Largest payer

ABBVIE INC.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

License & disciplinary context - Illinois IDFPR 2023 annual report

Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~42K Illinois medical licensees in 2023 - they are NOT specific to Diana Bowen, M.D.. To verify Diana Bowen, M.D.'s current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases

IDFPR publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Above average

Diana Bowen, M.D. - brand share 34.0%
Urology Physician average

34% brand-name claims vs 66% generic, on 369 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

369
Total Claims
$110K
Total Drug Cost
97
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
556
Total Day Supply
14,202
Brand vs Generic
34% brand / 66% generic
Brand Drug Cost
$98K
Generic Drug Cost
$12K
Antibiotic Claims
93

Patient Demographics

Average Patient Age
59.8 years
Avg HCC Risk Score
1.85
Gender Split
53% female / 47% male
Age Distribution
<65: 46, 65-74: N/A, 75-84: 24, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What Diana Bowen, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Myrbetriq
Mirabegron
73
Oxybutynin Chloride Er
Oxybutynin Chloride
53
Gemtesa
Vibegron
42
Ciprofloxacin Hcl
38
Tamsulosin Hcl
25
Gentamicin Sulfate
18
Methenamine Hippurate
17
Finasteride
14
Oxybutynin Chloride
14
Cephalexin
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Urology Physician Overview

How Diana Bowen, M.D. fits within the Urology Physician landscape nationally.

13,350
Urology Physician Providers in US
54
States with Urology Physician
1,280
Avg Claims per Provider

Diana Bowen, M.D.'s 369 claims are below the specialty average of 1,280.

Nearby Urology Physician Providers in Illinois

Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Bowen.

Compare Urology Physician nationally: see state-by-state distribution →

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Illinois medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Urology Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Diana Bowen, M.D.'s specialty?
Diana Bowen, M.D. specializes in Urology Physician and practices in Chicago, Illinois. Credentials: M.D..
How much does Diana Bowen, M.D. prescribe under Medicare Part D?
In 2023, Diana Bowen, M.D. wrote 369 Medicare Part D claims totaling $110K in drug costs for 97 beneficiaries.
Where is Diana Bowen, M.D. located?
Diana Bowen, M.D. is located at 225 E CHICAGO AVE, Chicago, IL, 60611. Phone: (312) 227-6342.
What is Diana Bowen, M.D.'s NPI number?
Diana Bowen, M.D.'s National Provider Identifier (NPI) is 1821318353, issued on 06/07/2010.
Does Diana Bowen, M.D. prescribe more brand-name or generic drugs?
Diana Bowen, M.D.'s prescribing is 34% brand-name and 66% generic drugs by claim count, with $98K in brand drug costs.
How many Urology Physician providers are there in the US?
There are 13,350 Urology Physician providers across 54 states in the US. The average Urology Physician provider writes 1,280 Medicare Part D claims per year.
What drugs does Diana Bowen, M.D. prescribe most often?
Based on 2023 Medicare Part D data, Diana Bowen, M.D.'s most frequently prescribed drugs include Myrbetriq, Oxybutynin Chloride Er, Gemtesa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Diana Bowen, M.D. accept Medicare?
Diana Bowen, M.D. appears in CMS Medicare data with 369 Part D claims and 97 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Diana Bowen, M.D.'s credentials?
Diana Bowen, M.D.'s NPI is 1821318353 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology

Compiled from official public sources by the PlainDoctor editorial team.