WALTER GARDINER, M.D.
Ph.D. Medical Genetics in CHRISTIANSTED, Virgin Islands. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.
What the federal data shows
WALTER GARDINER, M.D. filed 1,167 Medicare Part D claims in 2023 as a Ph.D. Medical Genetics in CHRISTIANSTED, Virgin Islands, prescribing 91% generic.
- 1K
- Part D claims, 2023
- 91%
- generic prescribing
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.
WALTER GARDINER, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023 — across all CMS prescribers nationally
1,167 Top 23% higher than 77% of 1,370,886 prescribers
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
What does the federal data show about WALTER GARDINER, M.D.?
Quality data not reportedPrimary specialty
Medicare Part D claims
Specialty distribution in Virgin Islands
How Ph.D. Medical Genetics compares to other specialties among Virgin Islands providers
Ph.D. Medical Genetics share within Virgin Islands
Ph.D. Medical Genetics is one of the more visible NUCC categories in Virgin Islands
Each bar reflects the share of in-state providers whose primary NUCC taxonomy matches the specialty. Long tail of ~690 NUCC codes folded into "Other" to keep the comparison legible.
Specialty board-certification context
Estimated specialty board-certified rate — Ph.D. Medical Genetics (ABMS / AOA reference)
- Est. board-certified rate
- 78%
- Ph.D. Medical Genetics ABMS/AOA estimate
Est. board-certified rate (Ph.D. Medical Genetics) — ABMS / AOA estimate
Verify credentials
- Verify via ABMS free public lookup
- Verify via AOA osteopathic boards
- Specialty volume Ph.D. Medical Genetics US NPIs
Specialty board-certified rate — Ph.D. Medical Genetics estimate
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus Maintenance of Certification cycles. CMS does not publish a per-provider board-certification field; the figure shown is the specialty-level estimated rate from ABMS / AOA reference data.
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).
WALTER GARDINER, M.D. is a Ph.D. Medical Genetics provider practicing in CHRISTIANSTED, Virgin Islands, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1225035280. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.
WALTER GARDINER, M.D. appears in the CMS NPPES registry as a Ph.D. Medical Genetics provider holding M.D. credentials at 5134 SUNDIAL PARK, CHRISTIANSTED, VI, 00820, with a listed phone of (340) 773-3227. NPI 1225035280 was issued on 07/06/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GARDINER 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 1,167 prescription claims written by this provider, covering 67 Medicare beneficiaries and totaling roughly $58K in drug spend, split 9% brand-name and 91% 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.
Ph.D. Medical Genetics is a narrow specialty nationwide, with 357 enrolled providers across 46 states and an average of 984 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 | 1225035280 |
|---|---|
| Specialty | Ph.D. Medical Genetics |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/06/2005 |
Verify this provider's license
PlainDoctor pulls this profile from the CMS NPPES public registry. Confirm WALTER GARDINER, M.D.'s current license status, disciplinary history, and board certifications directly with the licensing state's medical board before relying on this page for a clinical or care decision.
How we sourced this profile
Brand vs generic prescribing mix · Generic-heavy
9% brand-name claims vs 91% generic, on 1,167 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.
Prescribing Breakdown
- 30-Day Fills
- 1,294
- Total Day Supply
- 38,090
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $33K
- Generic Drug Cost
- $24K
- Antibiotic Claims
- 19
Patient Demographics
- Average Patient Age
- 74.2 years
- Avg HCC Risk Score
- 4.42
- Gender Split
- 31% female / 69% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Nifedipine Er Nifedipine | 177 |
| Losartan Potassium | 166 |
| Atorvastatin Calcium | 76 |
| Metformin Hcl | 64 |
| Pantoprazole Sodium | 58 |
| Glipizide Er Glipizide | 57 |
| Calcium Acetate | 52 |
| Amlodipine Besylate | 45 |
| Labetalol Hcl | 43 |
| Glipizide | 40 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ph.D. Medical Genetics Overview
How WALTER GARDINER, M.D. fits within the Ph.D. Medical Genetics landscape nationally.
WALTER GARDINER, M.D.'s 1,167 claims are above the specialty average of 984.
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Frequently Asked Questions
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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