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DR. STEPHEN EDWARD WELTER M.D.
NPI 1801906136
Internal Medicine in San Rafael, CA

Active since August 30, 2006PECOS Enrolled
75.1/100
CMS Quality Rating
100 THORNDALE DRIVE, MEDICAL CLINIC, SAN RAFAEL, CA 94903(415) 492-2410(415) 499-8395 Get Directions Write a Review

NPPES record last updated: April 4, 2022. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Stephen Edward Welter M.d. NPPES

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

DR. STEPHEN EDWARD WELTER M.D. (NPI 1801906136) is an individual internal medicine provider in San Rafael, California, licensed in California (G37927) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1801906136
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. STEPHEN EDWARD WELTERCredential: M.D.
Location Address100 THORNDALE DRIVE, MEDICAL CLINICSan Rafael, CA 94903
Mailing Address16 Sutro CtNovato, CA 94947-2809 · (415) 309-1096 · Fax (415) 728-9879
Phone(415) 492-2410
Fax(415) 499-8395
Sole ProprietorYes
Enumeration DateAugust 30, 2006
Last NPPES UpdateApril 4, 2022
NPPES CertifiedApril 4, 2022
✔ NPI 1801906136 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · G37927
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
100 THORNDALE DRIVE, San Rafael, CA 94903
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Other Identifiers 1

Medicaid00G379270CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Stephen Edward Welter M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94903 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
$154.04 typical visit price
range $69.07 – $202.63
Typical copayment $38.51 (range $17.26 – $50.65)
Most-billed visit code 99204
Established Patient
$119.61 typical visit price
range $23.44 – $166.64
Typical copayment $29.90 (range $5.86 – $41.66)
Most-billed visit code 99214
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.

75.1/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability78
Improvement Activities40
Cost57.33

Other Providers at the Same Location NPPES 2

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

MRS. WENDY ANNE NEWGREN P.T.A.
Physical Therapy Assistant
100 THORNDALE DRIVE
SAN RAFAEL, CA 94903
Marin County (415) 492-2419
VILLA MARIN HOMEOWNERS ASSOCIATION
Skilled Nursing Facility
100 THORNDALE DRIVE
SAN RAFAEL, CA 94903
Marin County (415) 492-2405

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 Stephen Welter's NPI number?

The NPI number for Stephen Welter is 1801906136. It was assigned to this individual provider in the NPPES registry on August 30, 2006.

Where is Stephen Welter located?

Stephen Welter practices at 100 Thorndale Drive Medical Clinic, San Rafael, CA 94903. The listed phone number is (415) 492-2410.

What is Stephen Welter's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Stephen Welter enrolled in Medicare?

Yes. Stephen Welter is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Stephen Welter was last updated on April 4, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.