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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

HOWARD C MARKS M.D.
NPI 1962479352
Internal Medicine - Gastroenterology in Manteca, CA

Active since March 03, 2006PECOS Enrolled
1234 E NORTH ST, SUITE 201, MANTECA, CA 95336(209) 239-0515(209) 239-0504 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Howard C Marks M.d. NPPES

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

HOWARD C MARKS M.D. (NPI 1962479352) is an individual gastroenterology provider in Manteca, California, licensed in California (G49155) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1962479352
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameHOWARD C MARKSCredential: M.D.
Location Address1234 E NORTH ST, SUITE 201Manteca, CA 95336-4960
Mailing Address1234 E North St, Suite 201Manteca, CA 95336-4960 · (209) 239-0515 · Fax (209) 239-0504
Phone(209) 239-0515
Fax(209) 239-0504
Sole ProprietorNo
Enumeration DateMarch 3, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1962479352 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · G49155
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
1234 E NORTH ST, Manteca, CA 95336
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Howard C Marks M.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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95336 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$133.94 typical visit price
range $58.87 – $176.60
Typical copayment $33.48 (range $14.71 – $44.15)
Most-billed visit code 99204
Established Patient
$103.36 typical visit price
range $19.28 – $144.60
Typical copayment $25.84 (range $4.82 – $36.15)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 13

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JACK ANDREW HARVEY D.P.M
Podiatrist (Foot & Ankle Surgery)
1234 E NORTH ST, STE 106
MANTECA, CA 95336
San Joaquin County (209) 823-2700
ABBAS KASHANI MD INC
Otolaryngology (Otolaryngology/Facial Plastic Surgery)
1234 E NORTH ST, 202
MANTECA, CA 95336
San Joaquin County (209) 239-5665
EUGENE V. NGUYEN, M.D., INC
Family Medicine
1234 E NORTH ST, STE 106
MANTECA, CA 95336
San Joaquin County (209) 824-7600
RENEE JEANNE LEE R.N., N.P.
Nurse Practitioner (Family)
1234 E NORTH ST, SUITE 102
MANTECA, CA 95336
San Joaquin County (209) 824-2202
RONALD R. YAMADA, M.D., INC
Orthopaedic Surgery
1234 E NORTH ST, SUITE 103
MANTECA, CA 95336
San Joaquin County (209) 824-8111
EUGENE V NGUYEN M.D.
Family Medicine
1234 E NORTH ST, STE 106
MANTECA, CA 95336
San Joaquin County (209) 824-7600
YONG L SHIH D.O
Surgery
1234 E NORTH ST, SUITE 105
MANTECA, CA 95336
San Joaquin County (209) 239-8086
DR. TONJA LYNETTE HARRIS-STANSIL M.D.
Obstetrics & Gynecology
1234 E NORTH ST, STE. 102
MANTECA, CA 95336
San Joaquin County (209) 824-2202

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 Howard Marks's NPI number?

The NPI number for Howard Marks is 1962479352. It was assigned to this individual provider in the NPPES registry on March 3, 2006.

Where is Howard Marks located?

Howard Marks practices at 1234 E North St Suite 201, Manteca, CA 95336. The listed phone number is (209) 239-0515.

What is Howard Marks's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Howard Marks enrolled in Medicare?

Yes. Howard Marks is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Howard Marks was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 days 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.