DR. MARK LAWRENCE WELCH M.D.
NPI 1619943644
Dermatology - MOHS-Micrographic Surgery in Bethesda, MD

Active since February 28, 2006PECOS EnrolledAccepts Medicare Assignment
100/100
CMS Quality Rating
6410 ROCKLEDGE DR, SUITE 300, BETHESDA, MD 20817(301) 564-3131(301) 564-6391 Get Directions Write a Review

NPPES record last updated: August 8, 2017. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Mark Lawrence Welch M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARK LAWRENCE WELCH M.D. (NPI 1619943644) is an individual mohs-micrographic surgery provider in Bethesda, Maryland, licensed in Maryland (D51120) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (1986).

NPPES Registry Identity

NPI1619943644
Entity TypeIndividualMale
Primary Taxonomy207ND0101X
Provider Legal NameDR. MARK LAWRENCE WELCHCredential: M.D.
Location Address6410 ROCKLEDGE DR, SUITE 300Bethesda, MD 20817-1809
Mailing Address6410 Rockledge Dr, Suite 300Bethesda, MD 20817-1809 · (301) 564-3131 · Fax (301) 564-6391
Fax(301) 564-6391
Sole ProprietorNo
Medical School CMSNew York Medical CollegeGraduated 1986
Enumeration DateFebruary 28, 2006
Last NPPES UpdateAugust 8, 2017
NPI 1619943644 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyDermatology · MOHS-Micrographic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207ND0101X
Licenses Licensed in MD · D51120 Licensed in VA · 101058507
Definition

The highly-trained surgeons that perform Mohs Micrographic Surgery are specialists both in dermatology and pathology. With their extensive knowledge of the skin and unique pathological skills, they are able to remove only diseased tissue, preserving healthy tissue and minimizing the cosmetic impact of the surgery. Mohs surgeons who belong to the American College of Mohs Surgery (ACMS) have completed a minimum of one year of fellowship training at one of the ACMS-approved training centers in the U.S.

6410 ROCKLEDGE DR, Bethesda, MD 20817

Other Identifiers 2

Medicare ID-Type UnspecifiedG00412-000Z30S12
Medicare UPING34935

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. Mark Lawrence Welch M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6507752458
PECOS Enrollment IDI20101123000524, I20170112000502
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 21

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, 1-5 tissue blocks 17311
This procedure involves the careful removal of a growth from the head, neck, hands, or feet. The removed tissue, divided into 1-5 blocks, is then examined under a microscope to study its characteristics and determine the nature of the growth.
455 services354 patients
Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, each additional stage, 1-5 tissue blocks 17312
This procedure involves the careful removal of abnormal growths from the head, neck, hands, or feet. The removed tissues, divided into 1-5 blocks, are then examined under a microscope to identify any irregularities. The process may be carried out in multiple stages for thorough examination.
201 services144 patients
Complicated repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet, 2.6-7.5 cm 13132
This procedure involves the complex repair of a wound in areas like the forehead, cheeks, chin, mouth, neck, underarms, hands, or feet. The wound size ranges from 2.6-7.5 cm. The process includes cleaning, removing damaged tissue, and stitching the wound for proper healing.
96 services89 patients
Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm 12032
This procedure involves the repair of a wound between 2.6-7.5 cm located on the scalp, underarms, trunk, arms, or legs. The process includes cleaning, debridement (removal of damaged tissue), and suturing (stitching) of the wound to promote healing.
84 services83 patients
Pathology examination of specimen during surgery, first tissue block 88331
A pathology examination during surgery involves the immediate analysis of a removed tissue sample. This helps the surgeon make decisions during your operation. The "first tissue block" refers to the initial sample examined. It's a vital step to ensure your health.
69 services51 patients
Removal and microscopic exam of growth of trunk, arms, or legs, 1-5 tissue blocks 17313
This procedure involves the removal of a growth from your trunk, arms, or legs. The removed tissue, divided into 1-5 blocks, is then examined under a microscope to identify any abnormalities. This helps in diagnosing and planning further treatment.
68 services59 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20817 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$100.31 typical visit price
range $65.18 – $194.86
Typical copayment $25.07 (range $16.29 – $48.71)
Most-billed visit code 99203
Established Patient
$80.66 typical visit price
range $21.40 – $158.88
Typical copayment $20.16 (range $5.35 – $39.72)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Occupational Therapist
6410 ROCKLEDGE DR, NRH REGIONAL REHAB - SUITE 600
BETHESDA, MD 20817
Acupuncturist
6410 ROCKLEDGE DR, SUITE 310
BETHESDA, MD 20817
Internal Medicine (Cardiovascular Disease)
6410 ROCKLEDGE DR, STE 200
BETHESDA, MD 20817
Internal Medicine (Medical Oncology)
6410 ROCKLEDGE DR, SUITE 660
BETHESDA, MD 20817
Speech-Language Pathologist
6410 ROCKLEDGE DR, NRH REGIONAL REHAB - SUITE 600
BETHESDA, MD 20817
Specialist/Technologist
6410 ROCKLEDGE DR, NRH REGIONAL REHAB - SUITE 600
BETHESDA, MD 20817
Physical Therapist
6410 ROCKLEDGE DR, NRH REGIONAL REHAB - SUITE 600
BETHESDA, MD 20817
Physical Therapist
6410 ROCKLEDGE DR, SUITE 301
BETHESDA, MD 20817

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Welch's NPI number?

The NPI number for Mark Welch is 1619943644. It was assigned to this individual provider in the NPPES registry on February 28, 2006.

Where is Mark Welch located?

Mark Welch practices at 6410 Rockledge Dr Suite 300, Bethesda, MD 20817. The listed phone number is (301) 564-3131.

What is Mark Welch's specialty?

The primary specialty registered for this NPI is Dermatology, specializing in MOHS-Micrographic Surgery, with taxonomy code 207ND0101X.

Is Mark Welch enrolled in Medicare?

Yes. Mark Welch is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Mark Welch was last updated on August 8, 2017. NPI Profile syncs with the weekly NPPES data releases published by CMS.