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DR. AARON MICHAEL NAYFACK MD
NPI 1407048598
Pediatrics - Developmental - Behavioral Pediatrics in San Carlos, CA

Active since August 14, 2007PECOS Enrolled
301 INDUSTRIAL RD, SAN CARLOS, CA 94070(650) 523-3960 Get Directions Write a Review

NPPES record last updated: May 29, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 29, 2020, Jan 11, 2017, Mar 4, 2016 (3 updates tracked since 2016).

About Dr. Aaron Michael Nayfack Md NPPES

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

DR. AARON MICHAEL NAYFACK MD (NPI 1407048598) is an individual developmental - behavioral pediatrics provider in San Carlos, California, licensed in California (G78133) and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS and maintains a secondary practice location in Los Altos.

NPPES Registry Identity

NPI1407048598
Entity TypeIndividualMale
Primary Taxonomy2080P0006X
Provider Legal NameDR. AARON MICHAEL NAYFACKCredential: MD
Location Address301 INDUSTRIAL RDSan Carlos, CA 94070-2603
Mailing Address325 Distel CirLos Altos, CA 94022-1408 · (408) 523-3960
Phone(650) 523-3960
Sole ProprietorNo
Enumeration DateAugust 14, 2007
Last NPPES UpdateMay 29, 20203 updates tracked since enumeration
NPPES CertifiedMay 29, 2020
✔ NPI 1407048598 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Developmental - Behavioral PediatricsAllopathic & Osteopathic Physicians
Taxonomy Code2080P0006X
License✔ Licensed in CA · G78133
Definition
A developmental-behavioral specialist is a pediatrician with special training and experience who aims to foster understanding and promotion of optimal development of children and families through research, education, clinical care and advocacy efforts. This physician assists in the prevention, diagnosis, and management of developmental difficulties and problematic behaviors in children and in the family dysfunctions that compromise children's development.
Also ListedPediatricsTaxonomy 208000000X · License A100829 (CA)
301 INDUSTRIAL RD, San Carlos, CA 94070
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Secondary Practice Location 1

Location 1370 Distel CircleLos Altos, CA 94022-1404 · Phone (650) 254-5200

Other Identifiers 1

OtherA100829CA · Medical Board Of Ca

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Aaron Michael Nayfack Md 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 Aaron Nayfack reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sutter Bay Medical Foundation
7.4 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.

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.

REBECCA ASHE MD
Internal Medicine
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4000
SARAH CHEYETTE MD
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4000
DR. ANDREA M TOM M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4030
GINELLE SUAREZ MERRILL PTA
Physical Therapy Assistant
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 321-4121
NAVEEN MAHMOOD MD
Pediatrics
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4000
DR. LAUREN KUTZSCHER THOMPSON MD, MS
Pediatrics
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4000
DR. HINA CHAWLA M.D.
Emergency Medicine
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4100
MRS. DIANA TATARKHANOVA NP
Nurse Practitioner (Obstetrics & Gynecology)
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4240

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 Aaron Nayfack's NPI number?

The NPI number for Aaron Nayfack is 1407048598. It was assigned to this individual provider in the NPPES registry on August 14, 2007.

Where is Aaron Nayfack located?

Aaron Nayfack practices at 301 Industrial Rd, San Carlos, CA 94070. The listed phone number is (650) 523-3960.

What is Aaron Nayfack's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Developmental - Behavioral Pediatrics, with taxonomy code 2080P0006X.

Is Aaron Nayfack enrolled in Medicare?

Yes. Aaron Nayfack is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Aaron Nayfack's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Nayfack 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 Aaron Nayfack'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 Aaron Nayfack was last updated on May 29, 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.