Dr. Lawrence J. McMaster, DO
- Medicare services, 2020
- 624
- Part D claims, 2024
- 1,994
- Industry payments
- $40
- Affiliated sites
- 1
- State license
- 1
- Practice address
- 1500 E Medical Center Dr, Ann Arbor, MI 48109
- Practice phone
- Call (734) 936-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
University Hospital
School-Based Health Center · Ann Arbor, Michigan
Find Dr. McMaster's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Lawrence J. McMaster is an internist in Ann Arbor, Michigan
Dr. McMaster practices at University Hospital in Ann Arbor, Michigan.
Dr. McMaster's NPI, 1316028541, was assigned on October 17, 2006. Dr. McMaster holds Michigan license 5101011410.
- NPI
- 1316028541NPI Registry (opens in a new tab)
- NPI enumeration date
- October 17, 2006
- NPI status
- Active
- Practice phone
- (734) 936-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Lawrence J. McMaster practices at University Hospital in Ann Arbor, Michigan
Dr. McMaster's primary practice is University Hospital, at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The practice phone is (734) 936-4000.
- University Hospital1500 E Medical Center Dr, Ann Arbor, MI 48109Phone(734) 936-4000
Source: Dmand AI Affiliation Data
Dr. Lawrence J. McMaster is affiliated with 1 site of care
Dr. McMaster's primary practice is University Hospital in Ann Arbor, Michigan. Dr. McMaster's employer is on file too: a school & student health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Lawrence J. McMaster's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McMaster practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Lawrence J. McMaster is one of 4,804 internists in Michigan
Internal medicine is Dr. McMaster's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. McMaster is licensed in Michigan.
Specialties and state licenses
- Internal medicine, MichiganPrimary
Internists near Dr. McMaster
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Lawrence J. McMaster billed Medicare for 624 services in 2020
CMS data shows 624 Medicare services from Dr. McMaster across 5 procedure codes in 2020. Medicare paid $36,427 for them.
Dr. McMaster's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 5752020: 41628%
- Other services
- 2019: 2302020: 19615%
- Tests and treatments
- 2019: 312020: 1261%
Where Dr. McMaster's Medicare services took place, 2020
- In an office61098%
- In a facility142%
Dr. McMaster compared with the Michigan median for internists, 2020
- Dr. McMaster
- Michigan median
- Medicare services
- 624vs 42348% above
- Part D claims
- 1,384vs 3144.4 times
Medians across 4,524 internists in Michigan with Dmand AI profiles that report each measure.
Dr. McMaster's most billed Medicare procedure codes, 2020
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. McMaster and other internists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Lawrence J. McMaster's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. McMaster's median patient age at 68, with 16% women.
Dr. McMaster's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women16%
- Men83%
Source: Dmand AI Patient Panel Data
Dr. Lawrence J. McMaster wrote 1,994 Medicare Part D claims in 2024
In 2024, Dr. McMaster wrote 1,994 Medicare Part D claims for 170 patients. 88% of them were for generic drugs. CMS names the drug for 1,384 of them, across 44 drugs with 11 or more claims each, at $149,375 in total drug cost. In 2023, CMS named 1,338 claims across 46 drugs.
Dr. McMaster's Part D claims by kind of drug, 2024
- Generic1,753 claims88%
- Brand-name230 claims12%
- Other11 claims1%
Dr. McMaster's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. McMaster's Part D claims, 2024
- Opioids3%61 of 1,994 claims
- Antibiotics3%55 of 1,994 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,3382024: 1,3843%
Drugs named by CMS: 44 in 2024, 46 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Lawrence J. McMaster received $40 in industry payments in 2025
CMS Open Payments shows 2 general payments to Dr. McMaster from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $40.
Companies that paid Dr. McMaster the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Lawrence J. McMaster's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Lawrence J. McMaster
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Lawrence J. McMaster's NPI number?
Dr. Lawrence J. McMaster's NPI number is 1316028541. It was assigned on October 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Lawrence J. McMaster?
Dr. Lawrence J. McMaster is an internist in Ann Arbor, Michigan. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Lawrence J. McMaster practice?
Dr. McMaster practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. Dr. McMaster's primary practice is University Hospital in Ann Arbor, Michigan.
What is Dr. Lawrence J. McMaster's office phone number?
The practice phone on file for Dr. McMaster is (734) 936-4000.
What is Dr. Lawrence J. McMaster's medical license number?
Dr. McMaster holds Michigan license 5101011410.
Does Dr. Lawrence J. McMaster accept Medicare?
Yes. CMS data shows Dr. McMaster billed Medicare for 624 services in 2020.
What services does Dr. Lawrence J. McMaster bill to Medicare?
In 2020, Dr. McMaster's most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and office visit, established patient (99213).
What drugs does Dr. Lawrence J. McMaster prescribe most?
In 2024 Medicare Part D data, Dr. McMaster's most prescribed drugs by claims were Atorvastatin Calcium, Rosuvastatin Calcium and Losartan Potassium.
Has Dr. Lawrence J. McMaster received payments from drug or device companies?
CMS Open Payments shows $40 in general payments to Dr. McMaster from 1 company from 2025 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Lawrence J. McMaster been practicing?
Dr. McMaster's NPI was assigned in 2006.
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