JANET M. HAHN MD
NPI 1841362654
Internal Medicine in Walnut Creek, CA

Active since November 15, 2006PECOS EnrolledAccepts Medicare Assignment
1425 S MAIN ST, WALNUT CREEK, CA 94596(925) 295-4000 Get Directions Write a Review

NPPES record last updated: January 10, 2022. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Janet M. Hahn Md NPPES

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

JANET M. HAHN MD (NPI 1841362654) is an individual internal medicine provider in Walnut Creek, California, licensed in California (A67633) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS and is a graduate of Loma Linda University School Of Medicine (1996).

NPPES Registry Identity

NPI1841362654
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameJANET M. HAHNCredential: MD
Location Address1425 S MAIN STWalnut Creek, CA 94596-5318
Mailing Address1800 Harrison St Fl 7Oakland, CA 94612-3466 · (510) 625-6262
Sole ProprietorNo
Medical School CMSLoma Linda University School Of MedicineGraduated 1996
Enumeration DateNovember 15, 2006
Last NPPES UpdateJanuary 10, 2022
NPI 1841362654 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 · A67633
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.

1425 S MAIN ST, Walnut Creek, CA 94596

Other Names 1

Other Name (5)Janet Choo

Other Identifiers 1

Medicaid00A676330CA

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

Janet M. Hahn Md 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 ID6800060641
PECOS Enrollment IDI20111114000410
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 94596 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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.

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.

Nurse Practitioner (Adult Health)
1425 S MAIN ST
WALNUT CREEK, CA 94596
Nurse Practitioner (Adult Health)
1425 S MAIN ST
WALNUT CREEK, CA 94596
Nurse Practitioner (Women's Health)
1425 S MAIN ST
WALNUT CREEK, CA 94596
Nurse Practitioner (Pediatrics)
1425 S MAIN ST
WALNUT CREEK, CA 94596
Pathology (Anatomic Pathology & Clinical Pathology)
1425 S MAIN ST
WALNUT CREEK, CA 94596
Nurse Practitioner (Gerontology)
1425 S MAIN ST, MOB 3RD FLOOR SURGERY CLINIC
WALNUT CREEK, CA 94596
Psychiatry & Neurology (Neurology)
1425 S MAIN ST
WALNUT CREEK, CA 94596
Internal Medicine
1425 S MAIN ST
WALNUT CREEK, CA 94596

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1841362654, enumerated as an "individual" on November 15, 2006.

The provider is located at 1425 S MAIN ST WALNUT CREEK, CA 94596 and the phone number is (925) 295-4000.

Internal Medicine with taxonomy code 207R00000X.

The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.