ALEXANDER JOSEPH HARTMAN MD
NPI 1639706336
Pediatrics in Palo Alto, CA
About Alexander Joseph Hartman Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDER JOSEPH HARTMAN MD (NPI 1639706336) is an individual pediatrics provider in Palo Alto, California, licensed in California (A183809) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Alexander Joseph Hartman Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
6Medicare enrollment records show Alexander Hartman reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Mateo, CA 94403
- Reassigned Medicare billing, California enrollment
- 430 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 1,159 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
San Francisco, CA 94111
- Reassigned Medicare billing, California enrollment
- 291 clinicians in this Medicare group
Los Angeles, CA 90011
- Reassigned Medicare billing, California enrollment
- 33 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 94304 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Alexander Hartman's NPI number?
The NPI number for Alexander Hartman is 1639706336. It was assigned to this individual provider in the NPPES registry on March 24, 2020.
Where is Alexander Hartman located?
Alexander Hartman practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.
What is Alexander Hartman's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Alexander Hartman enrolled in Medicare?
Yes. Alexander Hartman is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Alexander Hartman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Hartman reassigns Medicare benefits to 6 organizations: County Of San Mateo (San Mateo, CA), Ucsf Pediatrics Associates (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA), One Medical Group, Inc. (San Francisco, CA) and 1 more organization, listed in the Medicare section above. 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 Alexander Hartman'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 Alexander Hartman was last updated on April 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 months 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.
# Alexander Joseph Hartman, MD · NPI 1639706336
Pediatrics physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since March 24, 2020.
## Identity
- **NPI:** 1639706336 (Entity type: Individual)
- **Enumerated:** March 24, 2020
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** A183809 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 725 WELCH RD, Palo Alto, CA 94304-1601
- **Phone:** (650) 497-8000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): County Of San Mateo (NPI 1831268580, San Mateo, CA); Ucsf Pediatrics Associates (NPI 1376614016, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); One Medical Group, Inc. (NPI 1467781641, San Francisco, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 10, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1639706336) · Data from the CMS NPPES public registry.