JOHN DAVIS MCKELLAR PH.D.
NPI 1184893778
Psychologist - Addiction (Substance Use Disorder) in Los Gatos, CA

Q: What is John Mckellar's NPI number?

The NPI number for John Mckellar is 1184893778. It was assigned to this individual provider in the NPPES registry on February 27, 2008.

Q: What is John Mckellar's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Addiction (Substance Use Disorder), with taxonomy code 103TA0400X.

Q: When was this NPI record last updated?

The NPPES record for John Mckellar was last updated on July 11, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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 February 27, 2008PECOS Enrolled

15047 LOS GATOS BLVD, SUITE 200, LOS GATOS, CA 95032(408) 364-6799(408) 378-4510 Get Directions Write a Review

NPPES record last updated: July 11, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About John Davis Mckellar Ph.d. NPPES

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

JOHN DAVIS MCKELLAR PH.D. (NPI 1184893778) is an individual addiction (substance use disorder) provider in Los Gatos, California, licensed in California (18966) and active in the NPI registry since February 2008. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1184893778

Entity TypeIndividualMale

Primary Taxonomy103TA0400X

Provider Legal NameJOHN DAVIS MCKELLARCredential: PH.D.

Location Address15047 LOS GATOS BLVD, SUITE 200Los Gatos, CA 95032-2054

Mailing Address15047 Los Gatos Blvd, Suite 200Los Gatos, CA 95032-2054 · (408) 364-6799 · Fax (408) 378-4510

Phone(408) 364-6799

Fax(408) 378-4510

Sole ProprietorNo

Enumeration DateFebruary 27, 2008

Last NPPES UpdateJuly 11, 2014

✔ NPI 1184893778 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers

Taxonomy Code103TA0400X

License✔ Licensed in CA · 18966

Definition

A psychologist with a proficiency that involves the application of psychological treatment of addiction stemming from the use of alcohol and other psychoactive substances (e.g., nicotine, marijuana, cocaine, heroin) or behavioral addictions (e.g., gambling) with the aim of cessation or reduction of use and/or the amelioration of emotional, behavioral, interpersonal and other problems arising from the addictive behavior.

15047 LOS GATOS BLVD, Los Gatos, CA 95032

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Other Identifiers 1

Medicare PINCA122627CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

John Davis Mckellar Ph.d. 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 John Mckellar reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Integrated Pain Management Medical Group, Inc.

46 mi

Pain Medicine

450 N WIGET LN
Walnut Creek, CA 94598

Reassigned Medicare billing, California enrollment
137 clinicians in this Medicare group

NPI 1922198779 (925) 691-9806

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.

MR. LAWRENCE ZALE YEE M.P.T.

Physical Therapist (Orthopedic)

15047 LOS GATOS BLVD, SUITE 180
LOS GATOS, CA 95032

Santa Clara County (408) 358-6505

MS. ALYSSA GOMEZ FNP

Nurse Practitioner (Family)

15047 LOS GATOS BLVD, #200
LOS GATOS, CA 95032

Santa Clara County (408) 364-6799

LINDA HONEY JOSHUA NP,RN

Obstetrics & Gynecology

15047 LOS GATOS BLVD, 200
LOS GATOS, CA 95032

Santa Clara County (408) 364-6799

JOAN OLOFF D P M INC

Podiatrist

15047 LOS GATOS BLVD, SUITE 100
LOS GATOS, CA 95032

Santa Clara County (408) 356-2774

ALINA BOGDANOVICH FNP-BC

Nurse Practitioner

15047 LOS GATOS BLVD
LOS GATOS, CA 95032

Santa Clara County (408) 364-6799

FARDAD BAROUMAND MD

Physical Medicine & Rehabilitation (Pain Medicine)

15047 LOS GATOS BLVD, STE.200
LOS GATOS, CA 95032

Santa Clara County (408) 364-6799

MR. ROBERT IRWIN NABER P.T., O.C.S., A.T.C.

Physical Therapist (Orthopedic)

15047 LOS GATOS BLVD, SUITE 180
LOS GATOS, CA 95032

Santa Clara County (408) 358-6505

HUONG MAI HO-TRAN DPT

Specialist

15047 LOS GATOS BLVD, STE 200
LOS GATOS, CA 95032

Santa Clara County (408) 364-6799

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 John Mckellar's NPI number?

The NPI number for John Mckellar is 1184893778. It was assigned to this individual provider in the NPPES registry on February 27, 2008.

Where is John Mckellar located?

John Mckellar practices at 15047 Los Gatos Blvd Suite 200, Los Gatos, CA 95032. The listed phone number is (408) 364-6799.

What is John Mckellar's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Addiction (Substance Use Disorder), with taxonomy code 103TA0400X.

Is John Mckellar enrolled in Medicare?

Yes. John Mckellar is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for John Mckellar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Mckellar reassigns Medicare benefits to Integrated Pain Management Medical Group, Inc. (Walnut Creek, 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 John Mckellar'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 John Mckellar was last updated on July 11, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.