What is William Lamm's specialty?

William Lamm (NPI 1639156938) is a Medicare-billing provider whose primary specialty is Family Practice in Cumberland, MD.

Where does William Lamm practice?

William Lamm practices in Cumberland, MD, based on the location reported in the CMS Medicare provider datasets for NPI 1639156938.

How much does Medicare pay William Lamm?

William Lamm (NPI 1639156938) received approximately $20K in total Medicare Part B payments, serving 165 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1639156938

William LammM.D.

PRACTICEOBHG MARYLAND PCSee all providers at this practice →

Family PracticeCumberland, MDI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

169

Unique beneficiaries

—

Total services

196

Distinct HCPCS

Medicare payment

$17K

Peer benchmark

Total Medicare services vs. 988 Family Practice providers in MD — bottom quintile (cohort median 868).

PRESCRIBING · PART D · 2024

Total Rx claims

708

Beneficiaries

—

Total drug cost

$36K

Distinct drugs

Brand share

15.7%

Top prescribed drugs

Atorvastatin Calcium67 claims

Levothyroxine Sodium58 claims

Potassium Chloride39 claims

Apixaban37 claims

Amlodipine Besylate30 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where William Lamm's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 57 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Mary Dameron Nurse Practitioner · Frederick, MD	244	2,654
Patricia Jones Nurse Practitioner · Frederick, MD	240	2,502
Marcos Roffe Diagnostic Radiology · Cumberland, MD	154	825
PERINI SERVICES DEVLIN MANOR LIMITED PARTNERSHIP	149	1,239
NPI 1225077860	148	892
CHO, IK	128	569
Charles Magal Diagnostic Radiology · Cumberland, MD	98	421
James Benjamin Diagnostic Radiology · Cumberland, MD	96	371
Marshall Tarzy Podiatry · Frederick, MD	85	449
Cathy Cimaglia Podiatry · Oakland, MD	76	232
Abdul Cheema Hospitalist · Chambersburg, PA	52	317
Ardalan Enkeshafi Internal Medicine · Bethesda, MD	52	327

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events