NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1366471138 MD
Verify on CMS → Walter Gasser, MD
Internal Medicine Physician in Hilton Head Island, South Carolina.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 174,792 in Internal Medicine 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
Walter Gasser, MD is an Internal Medicine Physician in Hilton Head Island, South Carolina, listed in the federal CMS National Provider Identifier registry.
- #10
- Internal Medicine Physician rank among South Carolina 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 Walter Gasser, 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 1366471138), first enumerated 07/02/2006.
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.
Compare Gasser with other Internal Medicine Physician providers
Same primary specialty, same federal CMS NPPES roster.
All 23 Internal Medicine Physician providers in Hilton Head Island, SC →
Also enrolled in South Carolina
- Dr. John Abbott, M.D. Sumter, SC
- Dr. Murad Abdelsalam, MD Rock Hill, SC
- Dr. Mohammed Abdulfatah, MD Orangeburg, SC
- Dr. Amjad Abdulrahman, MD Irmo, SC
- Dr. Elizabeth Abell, MD Spartanburg, SC
- Dr. Alvin Abinsay, M.D. Marion, SC
Other specialties in Hilton Head Island: Physical Therapist (75) · Pharmacist (33) · Speech-Language Pathologist (26) · Occupational Therapist (24)
CMS NPPES provider registry desk
NPI 1366471138 · Internal Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-NONE · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1366471138
- ENUM-LEGACY 2006
- TAX-MEGA 175K Internal Medicine
- RX-NONE No Part D
- BOOK-LIGHT 2,276 in South Carolina
- PHOTO-ENUM Priscilla Furth · 2006
◑
Board-eligible specialty (heuristic, not verified)
Walter Gasser, 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 Walter Gasser, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Specialty distribution in South Carolina
How Internal Medicine Physician compares to other specialties among South Carolina 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 Internal Medicine 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 | 1366471138 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/02/2006 |
Internal Medicine Physician Overview
How Walter Gasser, MD fits within the Internal Medicine Physician landscape nationally.
174,792
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,785
Avg Claims per Provider
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Gasser, both outside South Carolina 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 Internal Medicine Physician Providers in South Carolina
Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as Gasser.
One of 2,276 Internal Medicine Physician providers enrolled in South Carolina, 11 are shown on this page.
Dr. Izabela Abissi
DO
Charleston, SC
Dr. Tinu Abraham
MD
Greenwood, SC
Dr. Natallia Abramovich
MD
Seneca, SC
Dr. Mohammad Abudalou
MD
Columbia, SC
Dr. Lauren Abusal
MD, MSCR
Myrtle Beach, SC
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Walter Gasser, MD's specialty? ▼
Walter Gasser, MD specializes in Internal Medicine Physician and practices in Hilton Head Island, South Carolina. Credentials: MD.
Where is Walter Gasser, MD located? ▼
Walter Gasser, MD is located at 4 INDIGO RUN DR, Hilton Head Island, SC, 29926. Phone: (843) 540-3231.
What is Walter Gasser, MD's NPI number? ▼
Walter Gasser, MD's National Provider Identifier (NPI) is 1366471138, issued on 07/02/2006.
How many Internal Medicine Physician providers are there in the US? ▼
There are 174,792 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,785 Medicare Part D claims per year.
Does Walter Gasser, MD accept Medicare? ▼
Walter Gasser, MD appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Walter Gasser, MD's credentials? ▼
Walter Gasser, MD's NPI is 1366471138 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.