NPI registry status
Active
2026 NPPES data Reproductive Endocrinology Physician NPI 1225118656 MD
Verify on CMS → John Buster, MD
Reproductive Endocrinology Physician in Providence, Rhode Island.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,468 in Reproductive Endocrinology 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.
What the federal data shows
John Buster, MD is a Reproductive Endocrinology Physician in Providence, Rhode Island, listed in the federal CMS National Provider Identifier registry.
- #145
- Reproductive Endocrinology Physician rank among Rhode Island specialties
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.
Federal trust snapshot
What official records show about John Buster, MD
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1225118656), first enumerated 10/17/2006.
Source: CMS NPPES
- Not in federal data
Medicare Part D participation
No 2023 Medicare Part D prescribing volume appears in the CMS public file for this NPI (may reflect specialty, new enrollment, or non-prescribing role).
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1225118656 · Reproductive Endocrinology Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1225118656
- ENUM-LEGACY 2006
- TAX-NARROW 1,468
- RX-NONE No Part D
- BOOK-THIN 11 in Rhode Island
- PHOTO-ENUM Susan Davies, M.D. · 2006
◑
Board-eligible specialty (heuristic, not verified)
John Buster, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about John Buster, MD?
Quality data not reportedPrimary specialty
Reproductive Endocrinology Physician
Specialty distribution in Rhode Island
How Reproductive Endocrinology Physician compares to other specialties among Rhode Island 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 Reproductive Endocrinology Physician. Verify directly:
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).
Practice Address
Provider Details
| NPI | 1225118656 |
|---|---|
| Specialty | Reproductive Endocrinology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/17/2006 |
More Reproductive Endocrinology Physician in RI →
All providers in Rhode Island →
Compare specialties →
Reproductive Endocrinology Physician Overview
How John Buster, MD fits within the Reproductive Endocrinology Physician landscape nationally.
1,468
Reproductive Endocrinology Physician Providers in US
47
States with Reproductive Endocrinology Physician
118
Avg Claims per Provider
Nationwide Reproductive Endocrinology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Buster, both outside Rhode Island so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Reproductive Endocrinology Physician Providers in Rhode Island
Other clinicians with the same primary specialty enrolled in Rhode Island, drawn from the same CMS NPPES roster as Buster.
One of 11 Reproductive Endocrinology Physician providers enrolled in Rhode Island, 5 are shown here.
Dr. Jennifer Bakkensen
M.D.
Providence, RI
Dr. Andrew Blazar
MD
Providence, RI
Dr. Andrey Dolinko
M.D.
Providence, RI
Dr. Gary Frishman
MD
Providence, RI
Dr. Stephanie Hallisey
MD
Providence, RI
Compare Reproductive Endocrinology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is John Buster, MD's specialty? ▼
John Buster, MD specializes in Reproductive Endocrinology Physician and practices in Providence, Rhode Island. Credentials: MD.
Where is John Buster, MD located? ▼
John Buster, MD is located at 101 DUDLEY ST, Providence, RI, 02905. Phone: (401) 274-1100.
What is John Buster, MD's NPI number? ▼
John Buster, MD's National Provider Identifier (NPI) is 1225118656, issued on 10/17/2006.
How many Reproductive Endocrinology Physician providers are there in the US? ▼
There are 1,468 Reproductive Endocrinology Physician providers across 47 states in the US. The average Reproductive Endocrinology Physician provider writes 118 Medicare Part D claims per year.
Does John Buster, MD accept Medicare? ▼
John Buster, MD appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Buster, MD's credentials? ▼
John Buster, MD's NPI is 1225118656 with credentials MD. 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.
- 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 August 2026 (NPPES) / 2024 (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
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 August 2026.