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DR. MERIK S. GROSS MD
NPI 1063562023
Internal Medicine in San Francisco, CA

Active since January 11, 2007Opted out of Medicare · through May 3, 2027CLIA 05D2191177 · Waiver
2356 SUTTER ST, SAN FRANCISCO, CA 94143(415) 885-7788 Get Directions Write a Review

NPPES record last updated: October 16, 2009. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Merik S. Gross Md NPPES

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

DR. MERIK S. GROSS MD (NPI 1063562023) is an individual internal medicine provider in San Francisco, California, licensed in California (A88209) and active in the NPI registry since January 2007. She has opted out of Medicare through May 3, 2027 and remains eligible to order and refer and holds a CLIA Waiver certificate valid through August 23, 2026.

NPPES Registry Identity

NPI1063562023
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. MERIK S. GROSSCredential: MD
Location Address2356 SUTTER STSan Francisco, CA 94143-0001
Mailing Address1635 Divisadero St Ste 625, Box 1821San Francisco, CA 94143-0001
Phone(415) 885-7788
Sole ProprietorNo
Enumeration DateJanuary 11, 2007
Last NPPES UpdateOctober 16, 2009
✔ NPI 1063562023 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A88209
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
2356 SUTTER ST, San Francisco, CA 94143
Open in Google Maps ↗

Other Identifiers 3

Medicare PIN00A882090CA
Medicaid00A882090CA
Medicare UPINH15657CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Merik S. Gross Md has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from May 3, 2017 through May 3, 2027.

Opt-Out Effective DateMay 3, 2017
Opt-Out In Effect ThroughMay 3, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

CLIA Laboratory Certificates CMS CLIA

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 05D2191177

Merik Gross MD · San Francisco, CA
Active · expires Aug 23, 2026
CLIA Number05D2191177
Laboratory TypePhysician Office
Certificate Effective DateAugust 24, 2024
Certificate Expiration DateAugust 23, 2026
Laboratory DirectorMerik S. Gross
Laboratory Phone(415) 923-3563
Laboratory LocationMerik Gross MD2100 Webster Street Suite 521, San Francisco, CA 94115
CLIA data matches this NPI record on: Name
This certificate is issued to a laboratory to perform only waived tests.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94143 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260
DME-Hospital Beds · category DB000N
1 supplier12 claims12 services$42.13 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 2

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

UCSF
General Acute Care Hospital (Women)
2356 SUTTER ST, FOURTH FLOOR
SAN FRANCISCO, CA 94143
San Francisco County (415) 885-7788
DR. GEORGE FRANKLIN SAWAYA MD
Obstetrics & Gynecology
2356 SUTTER ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 502-4090

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 Merik Gross's NPI number?

The NPI number for Merik Gross is 1063562023. It was assigned to this individual provider in the NPPES registry on January 11, 2007.

Where is Merik Gross located?

Merik Gross practices at 2356 Sutter St, San Francisco, CA 94143. The listed phone number is (415) 885-7788.

What is Merik Gross's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Merik Gross enrolled in Medicare?

No. Merik Gross has opted out of Medicare through May 3, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

Does Merik Gross hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D2191177) is associated with this NPI, valid through August 23, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Merik Gross was last updated on October 16, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.