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TIMOTHY S. JOHNSTON, M.D. PC
NPI 1407306665
Family Medicine in Merced, CA

Active since October 11, 2016
3349 G ST, SUITE F, MERCED, CA 95340(209) 349-8549(209) 580-4138 Get Directions Write a Review

NPPES record last updated: December 9, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 9, 2025, Apr 27, 2022, Mar 22, 2017 and 1 more (4 updates tracked since 2016).

About Timothy S. Johnston, M.d. Pc NPPES

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

TIMOTHY S. JOHNSTON, M.D. PC (NPI 1407306665) is a healthcare organization registered as a family medicine in Merced, California and active in the NPI registry since October 2016. The organization maintains a secondary practice location in Merced and lists Timothy Scott Johnston, Owner/operator, as its authorized official.

NPPES Registry Identity

NPI1407306665
Entity TypeOrganization
Primary Taxonomy207Q00000X
Legal Business NameTIMOTHY S. JOHNSTON, M.D. PC
Location Address3349 G ST, SUITE FMerced, CA 95340-0993
Mailing Address3349 G St Ste FMerced, CA 95340-0978 · (209) 349-8549 · Fax (209) 580-4138
Phone(209) 349-8549
Fax(209) 580-4138
Organization SubpartNo
Authorized OfficialTimothy Scott JohnstonOwner/operator · (209) 756-2275
Enumeration DateOctober 11, 2016
Last NPPES UpdateDecember 9, 20254 updates tracked since enumeration
NPPES CertifiedDecember 9, 2025
✔ NPI 1407306665 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · G58698
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
3349 G ST, Merced, CA 95340
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Secondary Practice Location 1

Location 13170 Collins Dr Ste BMerced, CA 95348-3164 · Phone (209) 349-8459 · Fax (209) 354-4607

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Timothy S. Johnston, M.d. Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

17

Medicare enrollment records show 17 clinicians reassign Medicare billing to Timothy S. Johnston, M.D. PC, which bills Medicare for the services they deliver. Of these, 10 practice at this address and 16 within 10 miles. They are listed nearest first.

Clinicians by Medicare Specialty 5

Nurse Practitioner8
Family Practice5
Obstetrics/Gynecology2
Gastroenterology1
Otolaryngology1

Clinicians, nearest first (17)

Zoe Anaman, M.D./M.P.H.
Family Practice
NPI 1326400532
3349 G ST STE F
Merced, CA 95340
(209) 349-8459
✔ PECOS✔ Accepts MedicareSame address
Mara Benitez, NP
Nurse Practitioner
NPI 1285415141
3349 G ST STE F
Merced, CA 95340
(209) 261-6946
✔ PECOSSame address
Gina Broussard, FNP
Nurse Practitioner
NPI 1023564812
3349 G ST STE F
Merced, CA 95340
(209) 349-8459
✔ PECOSSame address
Julie Davidson, FNP
Nurse Practitioner
NPI 1205481157
3349 G ST STE F
Merced, CA 95340
(209) 349-8459
✔ PECOSSame address
Eunice Hall, FNP-C
Nurse Practitioner
NPI 1518154277
3329 G ST STE B
Merced, CA 95340
(209) 349-8459
✔ PECOSSame address
Timothy Johnston, M.D.
Family Practice
NPI 1528097847
3349 G ST STE F
Merced, CA 95340
(209) 349-8459
✔ PECOS✔ Accepts MedicareSame address
Man-Siak Mak, MD
Gastroenterology
NPI 1609875004
3349 G STREET STE. F
Merced, CA 95340
(209) 349-8459
✔ PECOS✔ Accepts MedicareSame address
Brian Moore, MD
Obstetrics/Gynecology
NPI 1992817472
3349 G ST STE B
Merced, CA 95340
(209) 349-8459
✔ PECOS✔ Accepts MedicareSame address
Linda Ottemoeller, M.D.
Obstetrics/Gynecology
NPI 1912978115
3349 G ST STE B
Merced, CA 95340
(209) 349-8459
✔ PECOS✔ Accepts MedicareSame address
Lynda Scales, FNP
Nurse Practitioner
NPI 1447611272
3349 G ST STE F
Merced, CA 95340
(209) 349-8459
✔ PECOSSame address
Nicolette Pinocchio, FNP-C
Nurse Practitioner
NPI 1972282069
410 E YOSEMITE AVE STE B
Merced, CA 95340
(209) 934-8077
✔ PECOS2.9 mi
Mark Spitzer
Otolaryngology
NPI 1407848435
410 E YOSEMITE AVE STE B
Merced, CA 95340
(209) 934-8077
✔ PECOS✔ Accepts Medicare2.9 mi
Krista Calhoun, FNP
Family Practice
NPI 1447919501
3170 COLLINS DR STE B
Merced, CA 95348
(209) 233-3840
✔ PECOS3.3 mi
Michelle Ramirez, FNP
Nurse Practitioner
NPI 1881515427
3170 COLLINS DR STE B
Merced, CA 95348
(209) 233-3840
✔ PECOS✔ Accepts Medicare3.3 mi
Marie David, MD
Family Practice
NPI 1831202233
3351 M ST STE 120
Merced, CA 95348
(209) 631-1111
✔ PECOS✔ Accepts Medicare5.2 mi
Karina Tovar, NP
Nurse Practitioner
NPI 1396506820
3329 G ST STE B
Merced, CA 95340
(209) 349-8459
✔ PECOS7.2 mi
Augustine Provencio
Family Practice
NPI 1467590158
600 B ST BLDG A-C
Livingston, CA 95334
(209) 850-3500
✔ PECOS✔ Accepts Medicare18 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Timothy S. Johnston, M.D. PC's NPI number?

The NPI number for Timothy S. Johnston, M.D. PC is 1407306665. It was assigned to this organization in the NPPES registry on October 11, 2016.

Where is Timothy S. Johnston, M.D. PC located?

Timothy S. Johnston, M.D. PC is located at 3349 G St Suite F, Merced, CA 95340. The listed phone number is (209) 349-8549.

What is Timothy S. Johnston, M.D. PC's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Timothy S. Johnston, M.D. PC enrolled in Medicare?

Yes. Timothy S. Johnston, M.D. PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Timothy S. Johnston, M.D. PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 17 clinicians in 5 Medicare specialties reassign their Medicare billing to Timothy S. Johnston, M.D. PC. A 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 the clinician's services. The largest specialties are Nurse Practitioner (8), Family Practice (5) and Obstetrics/Gynecology (2). Of these, 10 practice at this address and 16 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Timothy S. Johnston, M.D. PC was last updated on December 9, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.