Walter Hollinger, MD
NPI 1679663405 · Internal Medicine Physician · Providence, RI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Walter Hollinger, MD is a Internal Medicine Physician provider in Providence, RI (NPI 1679663405).
Provider details
- NPI number
- 1679663405
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD11613 (RI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
234 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 147 | $91 |
| Hemoglobin A1c Level, By Device for Home Use83037 | 49 | $9 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 19 | $14 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 19 | $55 |
Typical Medicare-allowed amounts for these services range $9–$91 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 145 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,113 | 291 |
| Amlodipine Besylate | 872 | 215 |
| Metformin Hcl | 601 | 147 |
| Omeprazole | 563 | 127 |
| Losartan Potassium | 558 | 124 |
| Lisinopril | 452 | 120 |
| Empagliflozin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$162 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-13
- Last updated
- 2019-11-07
Frequently asked questions
- What is Walter Hollinger's NPI number?
- Walter Hollinger's National Provider Identifier (NPI) is 1679663405, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Walter Hollinger's specialty?
- Walter Hollinger is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Walter Hollinger located?
- Walter Hollinger's practice location on file with NPPES is 21 Peace St, Providence, RI 02907-1510.
- What is Walter Hollinger's phone number?
- The practice phone number listed in the NPPES registry for Walter Hollinger is (401) 456-3649.
- Does Walter Hollinger accept Medicare?
- Walter Hollinger is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Walter Hollinger's NPI active?
- Yes — Walter Hollinger's NPI (1679663405) is active in the NPPES registry as of the last update on 2019-11-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.