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OPTIMUS MEDICAL GROUP INC
NPI 1649416496
Internal Medicine in San Francisco, CA

Active since December 29, 2008
870 MARKET ST, SUITE 600, SAN FRANCISCO, CA 94102(415) 397-0700(415) 397-6805 Get Directions Write a Review

NPPES record last updated: September 9, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Optimus Medical Group Inc NPPES

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

OPTIMUS MEDICAL GROUP INC (NPI 1649416496) is a healthcare organization registered as an internal medicine in San Francisco, California and active in the NPI registry since December 2008. The organization lists Shawn K Hassler, Medical Director, as its authorized official.

NPPES Registry Identity

NPI1649416496
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameOPTIMUS MEDICAL GROUP INC
Location Address870 MARKET ST, SUITE 600San Francisco, CA 94102-3002
Mailing Address870 Market St, Suite 600San Francisco, CA 94102-3002 · (415) 397-0700 · Fax (415) 397-6805
Phone(415) 397-0700
Fax(415) 397-6805
Organization SubpartNo
Authorized OfficialShawn K HasslerMedical Director · (415) 397-0700
Enumeration DateDecember 29, 2008
Last NPPES UpdateSeptember 9, 2011
✔ NPI 1649416496 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 · A626830
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.
870 MARKET ST, San Francisco, CA 94102
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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)

Optimus Medical Group Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Optimus Medical Group Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Shawn Hassler, M.D.
Internal Medicine
NPI 1427122928
870 MARKET ST SUITE 600
San Francisco, CA 94102
(415) 397-0700
✔ PECOS✔ Accepts MedicareSame address

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 Optimus Medical Group Inc's NPI number?

The NPI number for Optimus Medical Group Inc is 1649416496. It was assigned to this organization in the NPPES registry on December 29, 2008.

Where is Optimus Medical Group Inc located?

Optimus Medical Group Inc is located at 870 Market St Suite 600, San Francisco, CA 94102. The listed phone number is (415) 397-0700.

What is Optimus Medical Group Inc's specialty?

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

Is Optimus Medical Group Inc enrolled in Medicare?

Yes. Optimus Medical Group Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Optimus Medical Group Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Optimus Medical Group Inc. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Optimus Medical Group Inc was last updated on September 9, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.