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

JOSEPH BYUNG HOON AN MD
NPI 1649910654
Internal Medicine in Sacramento, CA

Active since March 29, 2022PECOS Enrolled
4610 X ST STE 4202, SACRAMENTO, CA 95817(167) 036-7569 Get Directions Write a Review

NPPES record last updated: August 31, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 28, 2025, Nov 14, 2023 (2 updates tracked since 2023).

About Joseph Byung Hoon An Md NPPES

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

JOSEPH BYUNG HOON AN MD (NPI 1649910654) is an individual internal medicine provider in Sacramento, California, licensed in California (A202356) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1649910654
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameJOSEPH BYUNG HOON ANCredential: MD
Location Address4610 X ST STE 4202Sacramento, CA 95817-2200
Mailing Address4610 X St Ste 4202Sacramento, CA 95817-2200 · (167) 036-7569
Phone(167) 036-7569
Sole ProprietorNo
Enumeration DateMarch 29, 2022
Last NPPES UpdateAugust 31, 20252 updates tracked since enumeration
NPPES CertifiedAugust 30, 2025
✔ NPI 1649910654 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in CA · A202356✔ Licensed in VA · 0101280507
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 ListedGeneral PracticeTaxonomy 208D00000X · License 0101280507 (VA)
4610 X ST STE 4202, Sacramento, CA 95817
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Joseph Byung Hoon An Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignment

Medicare enrollment records show Joseph An reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Signify Health, LLC
1,433 mi
General Practice
4055 VALLEY VIEW LN STE 700
Dallas, TX 75244
  • Reassigned Medicare billing, Virginia enrollment
  • 501 clinicians in this Medicare group
NPI 1689158487 (469) 466-7007

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95817 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
$137.20 typical visit price
range $60.44 – $180.85
Typical copayment $34.30 (range $15.11 – $45.21)
Most-billed visit code 99204
Established Patient
$105.95 typical visit price
range $19.88 – $148.15
Typical copayment $26.48 (range $4.97 – $37.03)
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.

Other Providers at the Same Location NPPES 12

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

LAVINIA MIHAILA MD
Pediatrics (Neonatal-Perinatal Medicine)
4610 X ST STE 4202
SACRAMENTO, CA 95817
Sacramento County (916) 734-7797
DR. MICHAEL JUN FOON LUNG MD
Student in an Organized Health Care Education/Training Program
4610 X ST STE 4202
SACRAMENTO, CA 95817
Sacramento County (916) 734-8395
KAYLAN GRIFFITH
Student in an Organized Health Care Education/Training Program
4610 X ST STE 4202
SACRAMENTO, CA 95817
Sacramento County (916) 734-7797
BRANDON SWENSON
Student in an Organized Health Care Education/Training Program
4610 X ST STE 4202
SACRAMENTO, CA 95817
Sacramento County (530) 340-1132
NIKHIL PATEL
Internal Medicine (Hematology & Oncology)
4610 X ST STE 4202
SACRAMENTO, CA 95817
Sacramento County (916) 734-2011
DR. AMRITA ASHA MAHESH DO, MSC
Internal Medicine (Nephrology)
4610 X ST STE 4202
SACRAMENTO, CA 95817
Sacramento County (916) 734-7797
DR. MIRANDA STIEWIG-RAPP DO
Internal Medicine (Endocrinology, Diabetes & Metabolism)
4610 X ST STE 4202
SACRAMENTO, CA 95817
Sacramento County (916) 734-2727
DR. SIRISHA IRUVANTI DO
Psychiatry & Neurology (Psychiatry)
4610 X ST STE 4202
SACRAMENTO, CA 95817
Sacramento County (916) 734-7797

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 Joseph An's NPI number?

The NPI number for Joseph An is 1649910654. It was assigned to this individual provider in the NPPES registry on March 29, 2022.

Where is Joseph An located?

Joseph An practices at 4610 X St Ste 4202, Sacramento, CA 95817. The listed phone number is (167) 036-7569.

What is Joseph An's specialty?

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

Is Joseph An enrolled in Medicare?

Yes. Joseph An is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Joseph An's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joseph An reassigns Medicare benefits to Signify Health, LLC (Dallas, TX). The 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 Joseph An's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Joseph An was last updated on August 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.