Mark Lawrence Welch, M.D.
MOHS-Micrographic Surgery Physician · Bethesda, MD
Mark Lawrence Welch, M.D. is a mohs-micrographic surgery physician with a practice address in Bethesda, Maryland, and NPI 1619943644, issued on Feb 28, 2006. Check the license (Maryland D51120, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Mark Lawrence Welch
- Credential
- M.D.
- Primary taxonomy
- MOHS-Micrographic Surgery Physician 207ND0101X
- License numbers
- D51120 MD
101058507 VA
Self-reported in NPPES; status is on the state search - Practice location
- 6410 Rockledge Dr, Bethesda, MD 20817
- Phone
- (301) 564-3131
- Enumerated
- Feb 28, 2006
- Record last updated
- Aug 8, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (301) 564-6391
- Medicare enrollment
- Enrolled (PECOS I20170112000502); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 1986
- Entity
- Type 1 · individual
8 nearest mohs-micrographic surgery physician records → All 32 in Maryland → Look up another NPI →
Also registered at 6410 Rockledge Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lauren Adelsberger, OTOccupational Therapist1710156625
- Jennifer Akman, PTPhysical Therapist1730403874
- Kathleen Albert, OTOccupational Therapist1003096132
- Katherine Alley, MDSurgery Physician1811916158
- Rebecca Aronson, D.O.Physical Medicine & Rehabilitation Physician1760494546
- Christine Baron, SLPSpeech-Language Pathologist1659433365
Verify Mark Lawrence Welch in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D51120Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average mohs-micrographic surgery physician in 2024
34 Medicare Part D claims for 32 beneficiaries, against an average of 570 among the 1,396 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Cephalexin12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $52.49
1 payment: food and beverage; the largest payer was Lilly USA, LLC. The 1,074 providers of this specialty with any payment received $4,075.23 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Anne Arundel Dermatology PAHagerstown, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Lawrence Welch among 32 mohs-micrographic surgery physician records in Maryland
Mark Lawrence Welch, M.D. is one of 32 mohs-micrographic surgery physician records with a practice address in Maryland. 94% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 53% newer
- In a Medicare fileYes · 94% of these records are
- In the CMS Doctors and Clinicians fileYes · 91% of these records are
- Graduated1986 · median 2006 among the 29 with a school on file
- Record last updated2017 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ND0101X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
MOHS-Micrographic Surgery Physician providers in Maryland
There are 32 mohs-micrographic surgery physician records in Maryland.
All 32 in Maryland → Every provider in Bethesda → MOHS-Micrographic Surgery Physician nationwide →
The 8 mohs-micrographic surgery physician records with the nearest ZIP codes
- Rosemarie Liu, M.D.Bethesda, MD 208171467485250
- Jason Marquart, MDBethesda, MD 208171386723591
- Andrew Montemarano, D.O.Bethesda, MD 208171982670980
- Min Deng, M.D.Chevy Chase, MD 208151225316193
- Ali Hendi, M.D.Chevy Chase, MD 208151316935521
- Kristina Lim, DOChevy Chase, MD 208151871086330
- Patricia Richey, MDChevy Chase, MD 208151104270511
- Eric Finzi, MDGreenbelt, MD 207701164458873
Common questions
What is Mark Lawrence Welch, M.D.'s NPI number?
Mark Lawrence Welch, M.D.'s National Provider Identifier (NPI) is 1619943644, issued on Feb 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Lawrence Welch, M.D. located?
The NPPES record lists a practice address at 6410 Rockledge Dr, Bethesda, MD, 20817. Phone: (301) 564-3131. Providers update this record themselves, so call before visiting.
How can I verify Mark Lawrence Welch, M.D.'s license?
NPPES lists Maryland license number D51120, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Lawrence Welch, M.D. prescribe under Medicare Part D?
In 2024, Mark Lawrence Welch, M.D. had 34 Medicare Part D claims for 32 beneficiaries; the average among mohs-micrographic surgery physician prescribers was 570. Part D covers Medicare prescriptions only.
What is Mark Lawrence Welch, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.