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TIMOTHY S. JOHNSTON, M.D. PC
NPI 1972483493
Otolaryngology in Merced, CA

Active since September 04, 2025
410 E YOSEMITE AVE STE B, MERCED, CA 95340(209) 934-8077 Get Directions Write a Review

NPPES record last updated: November 3, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 3, 2025, Sep 4, 2025 (2 updates tracked since 2025).

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 1972483493), doing business as Yosemite Ent, is a healthcare organization registered as an otolaryngology in Merced, California and active in the NPI registry since September 2025. The organization lists Janette Purslow, Credentialing Coordinator, as its authorized official.

NPPES Registry Identity

NPI1972483493
Entity TypeOrganization
Primary Taxonomy207Y00000X
Legal Business NameTIMOTHY S. JOHNSTON, M.D. PC
Location Address410 E YOSEMITE AVE STE BMerced, CA 95340-8220
Mailing Address3349 G St Ste FMerced, CA 95340-0978 · (209) 349-8459 · Fax (209) 580-4138
Phone(209) 934-8077
Organization SubpartYes
Authorized OfficialJanette PurslowCredentialing Coordinator · (209) 349-8459
Enumeration DateSeptember 4, 2025
Last NPPES UpdateNovember 3, 20252 updates tracked since enumeration
NPPES CertifiedNovember 3, 2025
✔ NPI 1972483493 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOtolaryngologyAllopathic & Osteopathic Physicians
Taxonomy Code207Y00000X
Definition
An otolaryngologist-head and neck surgeon provides comprehensive medical and surgical care for patients with diseases and disorders that affect the ears, nose, throat, the respiratory and upper alimentary systems and related structures of the head and neck. An otolaryngologist diagnoses and provides medical and/or surgical therapy or prevention of diseases, allergies, neoplasms, deformities, disorders and/or injuries of the ears, nose, sinuses, throat, respiratory and upper alimentary systems, face, jaws and the other head and neck systems. Head and neck oncology, facial plastic and reconstructive surgery and the treatment of disorders of hearing and voice are fundamental areas of expertise.
410 E YOSEMITE AVE STE B, Merced, CA 95340
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Other Names 1

Doing Business AsYosemite Ent

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, 2 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)

Nicolette Pinocchio, FNP-C
Nurse Practitioner
NPI 1972282069
410 E YOSEMITE AVE STE B
Merced, CA 95340
(209) 934-8077
✔ PECOSSame address
Mark Spitzer
Otolaryngology
NPI 1407848435
410 E YOSEMITE AVE STE B
Merced, CA 95340
(209) 934-8077
✔ PECOS✔ Accepts MedicareSame address
Krista Calhoun, FNP
Family Practice
NPI 1447919501
3170 COLLINS DR STE B
Merced, CA 95348
(209) 233-3840
✔ PECOS0.8 mi
Michelle Ramirez, FNP
Nurse Practitioner
NPI 1881515427
3170 COLLINS DR STE B
Merced, CA 95348
(209) 233-3840
✔ PECOS✔ Accepts Medicare0.8 mi
Zoe Anaman, M.D./M.P.H.
Family Practice
NPI 1326400532
3349 G ST STE F
Merced, CA 95340
(209) 349-8459
✔ PECOS✔ Accepts Medicare2.9 mi
Mara Benitez, NP
Nurse Practitioner
NPI 1285415141
3349 G ST STE F
Merced, CA 95340
(209) 261-6946
✔ PECOS2.9 mi
Gina Broussard, FNP
Nurse Practitioner
NPI 1023564812
3349 G ST STE F
Merced, CA 95340
(209) 349-8459
✔ PECOS2.9 mi
Julie Davidson, FNP
Nurse Practitioner
NPI 1205481157
3349 G ST STE F
Merced, CA 95340
(209) 349-8459
✔ PECOS2.9 mi
Eunice Hall, FNP-C
Nurse Practitioner
NPI 1518154277
3329 G ST STE B
Merced, CA 95340
(209) 349-8459
✔ PECOS2.9 mi
Timothy Johnston, M.D.
Family Practice
NPI 1528097847
3349 G ST STE F
Merced, CA 95340
(209) 349-8459
✔ PECOS✔ Accepts Medicare2.9 mi
Man-Siak Mak, MD
Gastroenterology
NPI 1609875004
3349 G STREET STE. F
Merced, CA 95340
(209) 349-8459
✔ PECOS✔ Accepts Medicare2.9 mi
Brian Moore, MD
Obstetrics/Gynecology
NPI 1992817472
3349 G ST STE B
Merced, CA 95340
(209) 349-8459
✔ PECOS✔ Accepts Medicare2.9 mi
Linda Ottemoeller, M.D.
Obstetrics/Gynecology
NPI 1912978115
3349 G ST STE B
Merced, CA 95340
(209) 349-8459
✔ PECOS✔ Accepts Medicare2.9 mi
Lynda Scales, FNP
Nurse Practitioner
NPI 1447611272
3349 G ST STE F
Merced, CA 95340
(209) 349-8459
✔ PECOS2.9 mi
Marie David, MD
Family Practice
NPI 1831202233
3351 M ST STE 120
Merced, CA 95348
(209) 631-1111
✔ PECOS✔ Accepts Medicare4.4 mi
Karina Tovar, NP
Nurse Practitioner
NPI 1396506820
3329 G ST STE B
Merced, CA 95340
(209) 349-8459
✔ PECOS9.2 mi
Augustine Provencio
Family Practice
NPI 1467590158
600 B ST BLDG A-C
Livingston, CA 95334
(209) 850-3500
✔ PECOS✔ Accepts Medicare15 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 1972483493. It was assigned to this organization in the NPPES registry on September 4, 2025. The provider is doing business as Yosemite ENT.

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

Timothy S. Johnston, M.D. PC is located at 410 E Yosemite Ave Ste B, Merced, CA 95340. The listed phone number is (209) 934-8077.

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

The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.

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, 2 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 November 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.