William Feldmann, MD
NPI 1508821984 · Internal Medicine Physician · Salem, NH
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Feldmann, MD is a Internal Medicine Physician provider in Salem, NH (NPI 1508821984).
Provider details
- NPI number
- 1508821984
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 9800 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
4,100 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 484 | $90 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 389 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 302 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 237 | $10 |
| Automated Urinalysis Test81003 | 237 | $2 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 230 | $16 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 79 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 272 | 72 |
| Atorvastatin Calcium | 249 | 77 |
| Lisinopril | 237 | 63 |
| Levothyroxine Sodium | 226 | 60 |
| Metoprolol Succinate | 156 | 41 |
| Losartan Potassium | 140 | 37 |
| Hydrochlorothiazide |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-19
- Last updated
- 2025-09-11
Frequently asked questions
- What is William Feldmann's NPI number?
- William Feldmann's National Provider Identifier (NPI) is 1508821984, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Feldmann's specialty?
- William Feldmann is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Feldmann located?
- William Feldmann's practice location on file with NPPES is 22 Main St, Salem, NH 03079-5900.
- What is William Feldmann's phone number?
- The practice phone number listed in the NPPES registry for William Feldmann is (603) 893-7905.
- Does William Feldmann accept Medicare?
- William Feldmann is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Feldmann's NPI active?
- Yes — William Feldmann's NPI (1508821984) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.