DR. ALEXANDER A CHANG M.D.
NPI 1225356231
Internal Medicine in San Francisco, CA

Active since May 14, 2010PECOS EnrolledAccepts Medicare Assignment
909 HYDE ST STE 230, SAN FRANCISCO, CA 94109(415) 779-8332(415) 537-9078 Get Directions Write a Review

NPPES record last updated: July 27, 2023. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Alexander A Chang M.d. NPPES

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

DR. ALEXANDER A CHANG M.D. (NPI 1225356231) is an individual internal medicine provider in San Francisco, California, licensed in California (A127376) and active in the NPI registry since May 2010. He is enrolled in Medicare PECOS and is a graduate of Other (2014).

NPPES Registry Identity

NPI1225356231
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. ALEXANDER A CHANGCredential: M.D.
Location Address909 HYDE ST STE 230San Francisco, CA 94109-4845
Mailing Address909 Hyde St Ste 230San Francisco, CA 94109-4845 · (415) 779-8332 · Fax (415) 537-9078
Fax(415) 537-9078
Sole ProprietorYes
Medical School CMSOtherGraduated 2014
Enumeration DateMay 14, 2010
Last NPPES UpdateJuly 27, 2023
NPPES CertifiedJuly 27, 2023
NPI 1225356231 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in CA · A127376
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.

Also ListedPediatricsTaxonomy 208000000X · License A127376 (CA)
909 HYDE ST STE 230, San Francisco, CA 94109

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. Alexander A Chang 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 ID8325269772
PECOS Enrollment IDI20141028001532
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.

Areas of Expertise CMS Part B claims 11

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.
302 services131 patients
Acupuncture, initial 15 minutes 97810
Acupuncture is a traditional therapy where thin needles are inserted into specific points on your body. This initial 15-minute session aims to balance energy flow, relieve pain, and improve overall health. It's generally painless and considered safe.
109 services12 patients
Acupuncture, each additional 15 minutes 97811
Acupuncture is a traditional Chinese therapy that involves inserting thin needles at specific points on the body to balance energy flow. This service refers to each additional 15-minute session beyond your initial treatment. It may enhance the therapeutic effects and provide deeper relief from symptoms.
109 services12 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.
97 services58 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
87 services87 patients
Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a G0179
This procedure involves a doctor or approved practitioner reviewing your health status and re-certifying your need for Medicare-covered home health services. It includes communication with the home health agency and assessment of your health reports, even when you're not physically present.
62 services16 patients

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.

Referred Medical Equipment & Supplies CMS DME claims 6

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), without side rails, without mattress E0295
DME-Hospital Beds · category DB000N
1 supplier12 claims12 services$44.01 avg. paid by Medicare
Bed side rails, half length E0305
DME-Hospital Beds · category DB000N
1 supplier12 claims24 services$6.32 avg. paid by Medicare
Respiratory suction pump, home model, portable or stationary, electric E0600
DME-Other DME · category DE000N
1 supplier12 claims12 services$36.00 avg. paid by Medicare
Patient lift, hydraulic or mechanical, includes any seat, sling, strap(s) or pad(s) E0630
DME-Other DME · category DE000N
1 supplier11 claims11 services$37.68 avg. paid by Medicare
Standard wheelchair K0001
DME-Wheelchairs · category DD000N
2 suppliers15 claims15 services$18.65 avg. paid by Medicare
Elevating leg rests, pair (for use with capped rental wheelchair base) K0195
DME-Wheelchairs · category DD021N
1 supplier12 claims12 services$8.40 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 4

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

Podiatrist (Foot & Ankle Surgery)
909 HYDE ST STE 230
SAN FRANCISCO, CA 94109
Podiatrist (Foot & Ankle Surgery)
909 HYDE ST STE 230
SAN FRANCISCO, CA 94109
Internal Medicine
909 HYDE ST STE 230
SAN FRANCISCO, CA 94109
Physician Assistant
909 HYDE ST STE 230
SAN FRANCISCO, CA 94109

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 Alexander Chang's NPI number?

The NPI number for Alexander Chang is 1225356231. It was assigned to this individual provider in the NPPES registry on May 14, 2010.

Where is Alexander Chang located?

Alexander Chang practices at 909 Hyde St Ste 230, San Francisco, CA 94109. The listed phone number is (415) 779-8332.

What is Alexander Chang's specialty?

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

Is Alexander Chang enrolled in Medicare?

Yes. Alexander Chang 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 Alexander Chang was last updated on July 27, 2023. NPI Profile syncs with the weekly NPPES data releases published by CMS.