DR. GREGORY P MELCHER MD
NPI 1508846387
Internal Medicine - Infectious Disease in San Francisco, CA
About Dr. Gregory P Melcher Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GREGORY P MELCHER MD (NPI 1508846387) is an individual infectious disease provider in San Francisco, California, licensed in California (00G869540) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in San Francisco, and is a graduate of University Of Minnesota Medical School (1982).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Gregory P Melcher 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.
Medicare Billing Reassignments
3Medicare enrollment records show Gregory Melcher reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94114
- Reassigned Medicare billing, California enrollment
- 1,573 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1326013442 (California), NPI 1366417933 (California)
- 637 clinicians in this Medicare group
Sacramento, CA 95814
- Reassigned Medicare billing, California enrollment
- 68 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94114
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 Gregory Melcher's NPI number?
The NPI number for Gregory Melcher is 1508846387. It was assigned to this individual provider in the NPPES registry on January 18, 2006.
Where is Gregory Melcher located?
Gregory Melcher practices at 518A Castro St, San Francisco, CA 94114. The listed phone number is (415) 552-2814.
What is Gregory Melcher's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Gregory Melcher enrolled in Medicare?
Yes. Gregory Melcher 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.
Which organizations bill Medicare for Gregory Melcher's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Melcher reassigns Medicare benefits to 3 organizations: City & County Of San Francisco (San Francisco, CA), University Of California Sfgh Medical Group (San Francisco, CA) and Cares Community Health (Sacramento, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gregory Melcher's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Gregory Melcher was last updated on July 5, 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.
# Dr. Gregory P Melcher, MD · NPI 1508846387
Infectious Disease physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since January 18, 2006.
## Identity
- **NPI:** 1508846387 (Entity type: Individual)
- **Enumerated:** January 18, 2006
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 00G869540 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 518A CASTRO ST, San Francisco, CA 94114-2512
- **Phone:** (415) 552-2814 · **Fax:** (415) 552-2909
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): City & County Of San Francisco (NPI 1255440970, San Francisco, CA); University Of California Sfgh Medical Group (NPI 1356696215, San Francisco, CA); Cares Community Health (NPI 1447297379, Sacramento, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Minnesota Medical School, class of 1982
## Record status
- **NPPES last updated:** July 5, 2022
- **Other identifiers:** Other 00G869540 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1508846387) · Data from the CMS NPPES public registry.