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VALLEY BONE DENSITY CENTER
NPI 1033614193
Radiologic Technologist - Bone Densitometry in Merced, CA

Active since March 29, 2018CLIA Certified · 5 labs
3349 G ST STE B, MERCED, CA 95340(209) 233-3715(209) 580-4953 Get Directions Write a Review

NPPES record last updated: May 19, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 19, 2021, Nov 12, 2019, Feb 19, 2019 and 1 more (4 updates tracked since 2018).

About Valley Bone Density Center NPPES

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

VALLEY BONE DENSITY CENTER (NPI 1033614193) is a healthcare organization registered as a bone densitometry in Merced, California and active in the NPI registry since March 2018. The organization holds 5 active CLIA laboratory certificates and lists Timothy Scott Johnston, Family Practice, as its authorized official.

NPPES Registry Identity

NPI1033614193
Entity TypeOrganization
Primary Taxonomy2471B0102X
Legal Business NameTIMOTHY S. JOHNSTON, M.D. PC
Location Address3349 G ST STE BMerced, CA 95340-0978
Mailing Address3349 G St Ste FMerced, CA 95340-0978 · (209) 349-8459 · Fax (209) 580-4138
Phone(209) 233-3715
Fax(209) 580-4953
Organization SubpartNo
Authorized OfficialTimothy Scott JohnstonFamily Practice · (209) 349-8459
Enumeration DateMarch 29, 2018
Last NPPES UpdateMay 19, 20214 updates tracked since enumeration
NPPES CertifiedMay 19, 2021
✔ NPI 1033614193 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiologic Technologist · Bone DensitometryTechnologists, Technicians & Other Technical Service Providers
Taxonomy Code2471B0102X
Definition
A radiologic technologist who specializes in bone densitometry and is appropriately educated and trained, consistent with nationally recognized standards, state statute, and facility policy, in performance of bone density imaging, exam techniques, equipment protocols, radiation safety, and patient care.
3349 G ST STE B, Merced, CA 95340
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Other Names 1

Doing Business AsValley Bone Density Center

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)

Valley Bone Density Center 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 Valley Bone Density Center, 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.

CLIA Laboratory Certificates CMS CLIA 6

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 05D2289274

Timothy S Johnston MD PC · Merced, CA
Active · expires Sep 6, 2027
CLIA Number05D2289274
Laboratory TypePhysician Office
Certificate Effective DateSeptember 7, 2025
Certificate Expiration DateSeptember 6, 2027
Laboratory DirectorTimothy S. Johnston
Laboratory Phone(209) 349-8459
Laboratory LocationTimothy S Johnston MD PC3349 G St Ste B, Merced, CA 95340
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 05D2133808

Timothy S. Johnston, MD PC · Merced, CA
Active · expires Jul 19, 2027
CLIA Number05D2133808
Laboratory TypePhysician Office
Certificate Effective DateJuly 20, 2025
Certificate Expiration DateJuly 19, 2027
Laboratory DirectorTimothy S. Johnston, MD
Laboratory Phone(209) 349-8459
Laboratory LocationTimothy S. Johnston, MD PC3349 G St Ste F, Merced, CA 95340
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 05D2250801

Timothy S Johnston MD PC · Merced, CA
Active · expires Jan 27, 2028
CLIA Number05D2250801
Laboratory TypePhysician Office
Certificate Effective DateJanuary 28, 2026
Certificate Expiration DateJanuary 27, 2028
Laboratory DirectorTimothy Johnston
Laboratory Phone(209) 349-8459
Laboratory LocationTimothy S Johnston MD PC3180 Collins Drive, Merced, CA 95348
CLIA data matches this NPI record on: Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 05D2177342

Timothy S Johnston MD PC · Merced, CA
Active · expires Jan 7, 2028
CLIA Number05D2177342
Laboratory TypePhysician Office
Certificate Effective DateJanuary 8, 2026
Certificate Expiration DateJanuary 7, 2028
Laboratory DirectorTimothy S. Johnston
Laboratory Phone(209) 349-8459
Laboratory LocationTimothy S Johnston MD PC3329 G Street Suite B, Merced, CA 95340
CLIA data matches this NPI record on: Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 05D2316015

Timothy S Johnston MD, PC · Merced, CA
Active · expires Dec 23, 2026
CLIA Number05D2316015
Laboratory TypePhysician Office
Certificate Effective DateDecember 24, 2024
Certificate Expiration DateDecember 23, 2026
Laboratory DirectorTimothy Johnston
Laboratory Phone(209) 349-8459
Laboratory LocationTimothy S Johnston MD, PC3349 G St Ste G, Merced, CA 95340
CLIA data matches this NPI record on: Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 05D2269263

Timothy S Johnston MD, PC · Merced, CA
Expired · Sep 21, 2026
CLIA Number05D2269263
Laboratory TypePhysician Office
Certificate Effective DateSeptember 22, 2024
Certificate Expiration DateSeptember 21, 2026
Laboratory DirectorTimothy S. Johnston
Laboratory Phone(209) 349-8459
Laboratory LocationTimothy S Johnston MD, PC3170 Collins Dr Ste B, Merced, CA 95348
CLIA data matches this NPI record on: Phone
This certificate is issued to a laboratory to perform only waived tests.

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 1033614193. It was assigned to this organization in the NPPES registry on March 29, 2018. The provider is doing business as Valley Bone Density Center.

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

Timothy S. Johnston, M.D. PC is located at 3349 G St Ste B, Merced, CA 95340. The listed phone number is (209) 233-3715.

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

The primary specialty registered for this NPI is Radiologic Technologist, specializing in Bone Densitometry, with taxonomy code 2471B0102X.

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.

Does Timothy S. Johnston, M.D. PC hold CLIA laboratory certificates?

Yes. 5 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.

When was this NPI record last updated?

The NPPES record for Timothy S. Johnston, M.D. PC was last updated on May 19, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.