1. Home
  2. Directory
  3. California
  4. San Francisco
  5. Internal Medicine
  6. NPI Profile

DR. CHRISTOPHER MICHAEL HAMERSKI M.D.
NPI 1205033420
Internal Medicine - Gastroenterology in San Francisco, CA

Active since June 29, 2007PECOS EnrolledAccepts Medicare Assignment
1101 VAN NESS AVE RM 3158, SAN FRANCISCO, CA 94109(415) 600-1151 Get Directions Write a Review

NPPES record last updated: December 20, 2021. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Dec 20, 2021, Feb 14, 2020 (2 updates tracked since 2020).

About Dr. Christopher Michael Hamerski M.d. NPPES

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

DR. CHRISTOPHER MICHAEL HAMERSKI M.D. (NPI 1205033420) is an individual gastroenterology provider in San Francisco, California, licensed in California (A100282) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS and is a graduate of University Of California, San Francisco School Of Medicine (2005).

NPPES Registry Identity

NPI1205033420
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. CHRISTOPHER MICHAEL HAMERSKICredential: M.D.
Location Address1101 VAN NESS AVE RM 3158San Francisco, CA 94109-6919
Mailing AddressDept 34754, P.o. Box 39000San Francisco, CA 94139-0001 · (415) 600-1151 · Fax (415) 447-6330
Phone(415) 600-1151
Sole ProprietorNo
Medical School CMSUniversity Of California, San Francisco School Of MedicineGraduated 2005
Enumeration DateJune 29, 2007
Last NPPES UpdateDecember 20, 20212 updates tracked since enumeration
NPPES CertifiedFebruary 14, 2020
✔ NPI 1205033420 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · A100282
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.

Also ListedInternal MedicineTaxonomy 207R00000X · License A100282 (CA)
1101 VAN NESS AVE RM 3158, San Francisco, CA 94109
Open in Google Maps ↗

Other Identifiers 2

Medicaid1205033420CA
Other1205033420CA · Ccs Paneled

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Christopher Michael Hamerski M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7012077050
PECOS Enrollment IDI20081120000093
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 94109 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Colorectal Cancer Screening
Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer
100%99 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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 Christopher Hamerski's NPI number?

The NPI number for Christopher Hamerski is 1205033420. It was assigned to this individual provider in the NPPES registry on June 29, 2007.

Where is Christopher Hamerski located?

Christopher Hamerski practices at 1101 Van Ness Ave Rm 3158, San Francisco, CA 94109. The listed phone number is (415) 600-1151.

What is Christopher Hamerski's specialty?

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

Is Christopher Hamerski enrolled in Medicare?

Yes. Christopher Hamerski is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Christopher Hamerski was last updated on December 20, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.