NPI registry status
Active
2026 NPPES data Gynecologic Oncology Physician NPI 1508989468 M.D.
Verify on CMS → Wiley Fowler, M.D.
Gynecologic Oncology Physician in Sacramento, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,364 in Gynecologic Oncology 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
150
Medicare Part D claims · 56 beneficiaries · Gynecologic Oncology Physician avg: 188
MIPS score
96.5/100
▲ 13 pts above national avg 83.1 · Exceptional
Industry payments
$33.63
1 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Wiley Fowler, M.D. reported a CMS MIPS final score of 96.5/100 - above the 83.1 national average - and filed 150 Medicare Part D claims in 2023.
- 96.5/100
- MIPS score · +13 vs avg
- 150
- Part D claims, 2023
- 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.
Wiley Fowler, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
97 Top 17% higher than 83% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Wiley Fowler, M.D. sits
This provider among gynecologic oncology physician peers
Across the 446 gynecologic oncology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Wiley Fowler, M.D. writes more Part D claims than 56% of them and scores higher on MIPS quality than 81% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one gynecologic oncology physician peer from a representative sample of 60; the gold marker is Wiley Fowler, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Wiley Fowler, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Wiley Fowler, M.D.?
High performer (top quartile)Primary specialty
Gynecologic Oncology Physician
Medicare Part D claims
150 20% vs specialty avg
MIPS final score
96.5/100 13.4 pts vs avg
Specialty distribution in California
How Gynecologic Oncology Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Wiley Fowler, M.D.'s 2023 MIPS final score plotted against the Gynecologic Oncology Physician national average
- MIPS Final Score
- 96.5/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Gynecologic Oncology Physician) - 96.5/100 vs national avg 83.1
How MIPS and board certification work
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).
Wiley Fowler, M.D. appears in the CMS NPPES registry as a Gynecologic Oncology Physician provider holding M.D. credentials at 3000 Q STREET, Sacramento, CA, 95816, with a listed phone of (916) 733-3333. NPI 1508989468 was issued on 04/07/2007.
Medicare Part D records for calendar year 2023 show 150 prescription claims written by this provider, covering 56 Medicare beneficiaries and totaling roughly $5K in drug spend, with an opioid prescribing rate of 26.7%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 96.5/100 for the 2023 performance year (Quality 80.3), compared with the national average of 83.1.
Gynecologic Oncology Physician is a narrow specialty nationwide, with 1,364 enrolled providers across 49 states and an average of 188 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
Provider Details
| NPI | 1508989468 |
|---|---|
| Specialty | Gynecologic Oncology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 04/07/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
96.5085
Final Score
Avg: 83.1
80.342
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Wiley Fowler, 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.
Dignity Health Medical Foundation
Sacramento, CA
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 Wiley Fowler, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$34
Largest payer
AstraZeneca Pharmaceuticals LP
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 - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Wiley Fowler, M.D.. To verify Wiley Fowler, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
150
Total Claims
$5K
Total Drug Cost
56
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 150
- Total Day Supply
- 2,202
- Generic Drug Cost
- $5K
- Opioid Claims
- 40 (26.7% rate)
- Antibiotic Claims
- 18
Patient Demographics
- Average Patient Age
- 72.5 years
- Avg HCC Risk Score
- 1.36
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Wiley Fowler, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
27 claims
- Anastrozole
Anastrozole
23 claims
- Ibuprofen
Ibuprofen
15 claims
- Ondansetron Odt
Ondansetron Odt
15 claims
- Enoxaparin Sodium
Enoxaparin Sodium
14 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 27 |
| Anastrozole | 23 |
| Ibuprofen | 15 |
| Ondansetron Odt Ondansetron | 15 |
| Enoxaparin Sodium | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gynecologic Oncology Physician Overview
How Wiley Fowler, M.D. fits within the Gynecologic Oncology Physician landscape nationally.
1,364
Gynecologic Oncology Physician Providers in US
49
States with Gynecologic Oncology Physician
188
Avg Claims per Provider
Wiley Fowler, M.D.'s 150 claims are below the specialty average of 188.
Nearby Gynecologic Oncology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Fowler.
Dr. Lisa Abaid
M.D., M.P.H.
Newport Beach, CA
Dr. Alireza Abidi
M.D.
Sacramento, CA
Dr. Federico Alva
M.D.
Northridge, CA
Dr. Edwin Alvarez
M.D.
Sacramento, CA
Dr. Kristen Anderson
M.D., PH.D.
Moreno Valley, CA
Compare Gynecologic Oncology 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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gynecologic Oncology 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.
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Frequently Asked Questions
What is Wiley Fowler, M.D.'s specialty? ▼
Wiley Fowler, M.D. specializes in Gynecologic Oncology Physician and practices in Sacramento, California. Credentials: M.D..
How much does Wiley Fowler, M.D. prescribe under Medicare Part D? ▼
In 2023, Wiley Fowler, M.D. wrote 150 Medicare Part D claims totaling $5K in drug costs for 56 beneficiaries.
What is Wiley Fowler, M.D.'s Medicare quality score? ▼
Wiley Fowler, M.D. has a CMS MIPS Final Score of 96.5/100 (Quality: 80.3). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Wiley Fowler, M.D. located? ▼
Wiley Fowler, M.D. is located at 3000 Q STREET, Sacramento, CA, 95816. Phone: (916) 733-3333.
What is Wiley Fowler, M.D.'s NPI number? ▼
Wiley Fowler, M.D.'s National Provider Identifier (NPI) is 1508989468, issued on 04/07/2007.
Does Wiley Fowler, M.D. prescribe opioids? ▼
Yes, Wiley Fowler, M.D. had 40 opioid claims in 2023 with an opioid prescribing rate of 26.7%.
How many Gynecologic Oncology Physician providers are there in the US? ▼
There are 1,364 Gynecologic Oncology Physician providers across 49 states in the US. The average Gynecologic Oncology Physician provider writes 188 Medicare Part D claims per year.
What drugs does Wiley Fowler, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Wiley Fowler, M.D.'s most frequently prescribed drugs include Hydrocodone-Acetaminophen, Anastrozole, Ibuprofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Wiley Fowler, M.D. accept Medicare? ▼
Wiley Fowler, M.D. appears in CMS Medicare data with 150 Part D claims and 56 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Wiley Fowler, M.D.'s credentials? ▼
Wiley Fowler, M.D.'s NPI is 1508989468 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
View source datasets and methodology notes
- 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.