DR. SHAWN KENT HASSLER M.D.
NPI 1427122928
Internal Medicine - Infectious Disease in San Francisco, CA

Active since November 17, 2006PECOS EnrolledAccepts Medicare AssignmentCLIA 05D0958038 · Waiver
27.13/100
CMS Quality Rating
870 MARKET ST, SUITE 600, SAN FRANCISCO, CA 94102(415) 397-0700(415) 397-6802 Get Directions Write a Review

NPPES record last updated: April 9, 2008. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Shawn Kent Hassler M.d. NPPES

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

DR. SHAWN KENT HASSLER M.D. (NPI 1427122928) is an individual infectious disease provider in San Francisco, California, licensed in California (A062683) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through July 7, 2028, and is a graduate of University Of Miami, Lm Miller School Of Medicine (1995).

NPPES Registry Identity

NPI1427122928
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameDR. SHAWN KENT HASSLERCredential: M.D.
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
Fax(415) 397-6802
Sole ProprietorYes
Medical School CMSUniversity Of Miami, Lm Miller School Of MedicineGraduated 1995
Enumeration DateNovember 17, 2006
Last NPPES UpdateApril 9, 2008
NPI 1427122928 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License Licensed in CA · A062683
Definition

An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

870 MARKET ST, San Francisco, CA 94102

Other Identifiers 4

Medicare ID-Type Unspecified00A626830CA · Medicare
OtherA062683CA · Medical License Number
Medicare UPING77471CA
MedicaidCNC324854CA

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. Shawn Kent Hassler 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 ID6800787136
PECOS Enrollment IDI20040324000558
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.

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 05D0958038

Shawn K Hassler MD · San Francisco, CA
Active · expires Jul 7, 2028
CLIA Number05D0958038
Laboratory TypePhysician Office
Certificate Effective DateJuly 8, 2026
Certificate Expiration DateJuly 7, 2028
Laboratory DirectorShawn A. Hassler MD
Laboratory Phone(415) 397-0700
Laboratory LocationShawn K Hassler MD870 Market Street #600, San Francisco, CA 94102
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
574 services168 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
122 services78 patients
Injection of drug or substance under skin or into muscle 96372
This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
106 services15 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
42 services42 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
25 services25 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
23 services19 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94102 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.

27.13/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored
Quality0
Improvement Activities0
Cost90.44

Referred Medical Equipment & Supplies CMS DME claims 3

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

Filter, disposable, used with positive airway pressure device A7038
DME-Other DME · category DE001N
3 suppliers11 claims66 services$2.16 avg. paid by Medicare
Standard wheelchair K0001
DME-Wheelchairs · category DD000N
1 supplier11 claims11 services$16.94 avg. paid by Medicare
Elevating leg rests, pair (for use with capped rental wheelchair base) K0195
DME-Wheelchairs · category DD021N
1 supplier11 claims11 services$7.99 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 20

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

Chiropractor
870 MARKET ST, SUITE 883
SAN FRANCISCO, CA 94102
Marriage & Family Therapist
870 MARKET ST, SUITE 850
SAN FRANCISCO, CA 94102
Marriage & Family Therapist
870 MARKET ST, SUITE 655
SAN FRANCISCO, CA 94102
Acupuncturist
870 MARKET ST, SUITE 309
SAN FRANCISCO, CA 94102
Marriage & Family Therapist
870 MARKET ST, SUITE 1252
SAN FRANCISCO, CA 94102
Acupuncturist
870 MARKET ST, SUITE 309
SAN FRANCISCO, CA 94102
Health Maintenance Organization
870 MARKET ST, 721
SAN FRANCISCO, CA 94102
Psychologist
870 MARKET ST, STE. 753
SAN FRANCISCO, CA 94102

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 Shawn Hassler's NPI number?

The NPI number for Shawn Hassler is 1427122928. It was assigned to this individual provider in the NPPES registry on November 17, 2006.

Where is Shawn Hassler located?

Shawn Hassler practices at 870 Market St Suite 600, San Francisco, CA 94102. The listed phone number is (415) 397-0700.

What is Shawn Hassler's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Shawn Hassler enrolled in Medicare?

Yes. Shawn Hassler 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.

Does Shawn Hassler hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D0958038) is associated with this NPI, valid through July 7, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Shawn Hassler was last updated on April 9, 2008. NPI Profile syncs with the weekly NPPES data releases published by CMS.