William Lamm, M.D.
NPI 1639156938 · Family Medicine Physician · Cumberland, MD
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Lamm, M.D. is a Family Medicine Physician provider in Cumberland, MD (NPI 1639156938).
Provider details
- NPI number
- 1639156938
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D0025406 (MD)
Specialties & taxonomies
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
196 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 100 | $106 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 71 | $131 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 25 | $76 |
Typical Medicare-allowed amounts for these services range $76–$131 (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 · 31 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Atorvastatin Calcium | 67 |
| Levothyroxine Sodium | 58 |
| Potassium Chloride | 39 |
| Apixabanbrand: Eliquis | 37 |
| Amlodipine Besylate | 30 |
| Furosemide | 30 |
| Donepezil Hcl | 29 |
| Gabapentin | 29 |
| Losartan Potassium | 27 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-28
- Last updated
- 2010-11-11
Frequently asked questions
- What is William Lamm's NPI number?
- William Lamm's National Provider Identifier (NPI) is 1639156938, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Lamm's specialty?
- William Lamm is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Lamm located?
- William Lamm's practice location on file with NPPES is 12500 Willowbrook Rd, Cumberland, MD 21502-6393.
- What is William Lamm's phone number?
- The practice phone number listed in the NPPES registry for William Lamm is (240) 964-8564.
- Does William Lamm accept Medicare?
- William Lamm is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Lamm's NPI active?
- Yes — William Lamm's NPI (1639156938) is active in the NPPES registry as of the last update on 2010-11-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.