DR. ALGER B CHAPMAN III MD PHD
NPI 1437145216
Pediatrics in San Mateo, CA

Q: What is Alger Chapman's NPI number?

The NPI number for Alger Chapman is 1437145216. It was assigned to this individual provider in the NPPES registry on September 27, 2005.

Q: What is Alger Chapman's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for Alger Chapman was last updated on March 9, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.

Active since September 27, 2005PECOS Enrolled

50 S SAN MATEO DR, STE 260, SAN MATEO, CA 94401(650) 579-6500(650) 579-1943 Get Directions Write a Review

NPPES record last updated: March 9, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Alger B Chapman Iii Md Phd NPPES

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

DR. ALGER B CHAPMAN III MD PHD (NPI 1437145216) is an individual pediatrics provider in San Mateo, California, licensed in California (G064005) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1437145216

Entity TypeIndividualMale

Primary Taxonomy208000000X

Provider Legal NameDR. ALGER B CHAPMAN IIICredential: MD PHD

Location Address50 S SAN MATEO DR, STE 260San Mateo, CA 94401-3857

Mailing Address325 Distel CirLos Altos, CA 94022-1408 · (650) 579-6500

Phone(650) 579-6500

Fax(650) 579-1943

Sole ProprietorNo

Enumeration DateSeptember 27, 2005

Last NPPES UpdateMarch 9, 2020

NPPES CertifiedMarch 9, 2020

✔ NPI 1437145216 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in CA · G064005

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

50 S SAN MATEO DR, San Mateo, CA 94401

Open in Google Maps ↗

Other Identifiers 2

Other00G640050CA · Blue Shield Ca

OtherZZZ00797ZCA · Blue Shield Ca -group Id

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Alger B Chapman Iii Md Phd 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.

Medicare Billing Reassignment

Medicare enrollment records show Alger Chapman reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sutter Bay Medical Foundation

13 mi

Multi-Specialty

795 EL CAMINO REAL
Palo Alto, CA 94301

Reassigned Medicare billing, California enrollment
4,479 clinicians in this Medicare group

NPI 1013950807 (650) 321-4121

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 94401 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

$104.51 typical visit price

range $69.00 – $202.35

Typical copayment $26.12 (range $17.25 – $50.58)

Most-billed visit code 99203

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.

SOMYA JALAN MD

Pediatrics

50 S SAN MATEO DR
SAN MATEO, CA 94401

San Mateo County (650) 652-8353

DR. STEPHEN BUCHNER MD

Pediatrics

50 S SAN MATEO DR, STE 180
SAN MATEO, CA 94401

San Mateo County (650) 342-4145

DR. GEORGE WILLIAM SHORAGO M.D.

Otolaryngology

50 S SAN MATEO DR, SUITE 320
SAN MATEO, CA 94401

San Mateo County (650) 340-7200

JULIAN HARDY MCLAIN MD

Internal Medicine (Hematology & Oncology)

50 S SAN MATEO DR
SAN MATEO, CA 94401

San Mateo County (650) 696-5420

HOWARD K CHOW MD

Pediatrics

50 S SAN MATEO DR, SUITE 260
SAN MATEO, CA 94401

San Mateo County (650) 579-6500

DENISE MARY ROS

Physician Assistant

50 S SAN MATEO DR
SAN MATEO, CA 94401

San Mateo County (650) 652-8788

JEANNE V BEYMER MD

Pediatrics

50 S SAN MATEO DR, STE 260
SAN MATEO, CA 94401

San Mateo County (650) 579-6500

DR. JOHN ROBERT GRIFFIN M.D.

Surgery (Plastic and Reconstructive Surgery)

50 S SAN MATEO DR, STE 470
SAN MATEO, CA 94401

San Mateo County (650) 652-8239

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 Alger Chapman's NPI number?

The NPI number for Alger Chapman is 1437145216. It was assigned to this individual provider in the NPPES registry on September 27, 2005.

Where is Alger Chapman located?

Alger Chapman practices at 50 S San Mateo Dr Ste 260, San Mateo, CA 94401. The listed phone number is (650) 579-6500.

What is Alger Chapman's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Alger Chapman enrolled in Medicare?

Yes. Alger Chapman is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alger Chapman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alger Chapman reassigns Medicare benefits to Sutter Bay Medical Foundation (Palo Alto, CA). The 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 Alger Chapman'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 Alger Chapman was last updated on March 9, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.