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JOSIAH AN M.D.
NPI 1053791517
Internal Medicine - Hematology & Oncology in Winston Salem, NC

Active since May 31, 2015PECOS EnrolledAccepts Medicare Assignment
3333 SILAS CREEK PKWY, WINSTON SALEM, NC 27103(336) 277-8800(336) 277-8850 Get Directions Write a Review

NPPES record last updated: December 17, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 17, 2025, May 8, 2024, Apr 22, 2022 and 2 more (5 updates tracked since 2021).

About Josiah An M.d. NPPES

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

JOSIAH AN M.D. (NPI 1053791517) is an individual hematology & oncology provider in Winston Salem, North Carolina, licensed in North Carolina (2021-01298) and active in the NPI registry since May 2015. He is enrolled in Medicare PECOS, is affiliated with Novant Health Thomasville Medical Center, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1053791517
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameJOSIAH ANCredential: M.D.
Location Address3333 SILAS CREEK PKWYWinston Salem, NC 27103-3013
Mailing AddressPo Box 60516Charlotte, NC 28260-0516
Phone(336) 277-8800
Fax(336) 277-8850
Sole ProprietorNo
Medical School CMSSouthern Illinois University School Of MedicineGraduated 2015
Enumeration DateMay 31, 2015
Last NPPES UpdateDecember 17, 20255 updates tracked since enumeration
NPPES CertifiedDecember 17, 2025
✔ NPI 1053791517 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 5

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
Licenses✔ Licensed in NC · 2021-01298✔ Licensed in IA · R10218✔ Licensed in WA · MD70049970
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Also ListedInternal MedicineTaxonomy 207R00000X · License R10218 (IA)
Also ListedInternal Medicine · Cardiovascular DiseaseTaxonomy 207RC0000X · License R10218 (IA)
Also ListedInternal Medicine · GastroenterologyTaxonomy 207RG0100X · License R10218 (IA)
Also ListedInternal Medicine · Pulmonary DiseaseTaxonomy 207RP1001X · License R10218 (IA)
3333 SILAS CREEK PKWY, Winston Salem, NC 27103
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1200 Hawkins Dr, Dept of Internal MedicineIowa City, IA 52242-1009 · Phone (319) 384-9668 · Fax (319) 384-8955
Location 2201 16th Ave ESeattle, WA 98112-5226 · Phone (206) 326-3111 · Fax (877) 515-2975

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Josiah An 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 ID6406168145
PECOS Enrollment IDI20240402001541
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 Reassignments

3

Medicare enrollment records show Josiah An reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Southern California Permanente Medical Group
2,101 mi
Health Maintenance Organization
4647 ZION AVE
San Diego, CA 92120
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group
NPI 1225060742 (619) 528-5000
Kaiser Foundation Health Plan Of Washington
2,273 mi
Multi-Specialty
2715 NACHES AVE SW # GSWA1N02
Renton, WA 98057
  • Reassigned Medicare billing, Washington enrollment
  • 2,678 clinicians in this Medicare group
NPI 1124264577 (509) 241-7349
Hawaii Permanente Medical Group Inc
4,700 mi
Health Maintenance Organization
3288 MOANALUA RD
Honolulu, HI 96819
  • Reassigned Medicare billing, Hawaii enrollment
  • 1,187 clinicians in this Medicare group
NPI 1710945969 (808) 432-0000

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

Areas of Expertise CMS Part B claims

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.

Infusion, normal saline solution , 1000 cc J7030
An infusion of normal saline solution, 1000 cc, is a common medical procedure. It involves introducing a saltwater solution into your bloodstream via an intravenous (IV) line. This helps to hydrate your body, correct electrolyte imbalances, and deliver medications if needed.
24 services15 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Novant Health Thomasville Medical Center

Acute Care Hospitals · Thomasville, NC
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number340085
Location207 Old Lexington Rd Box 789Thomasville, NC 27360 · Davidson County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 27103 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
$165.09 typical visit price
range $54.12 – $165.09
Typical copayment $41.27 (range $13.53 – $41.27)
Most-billed visit code 99205
Established Patient
$95.94 typical visit price
range $17.21 – $134.61
Typical copayment $23.98 (range $4.30 – $33.65)
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 20

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

DR. DEEPAK S NAIR M.D.
Psychiatry & Neurology (Neurology)
3333 SILAS CREEK PKWY
WINSTON SALEM, NC 27103
Forsyth County (336) 718-7224
BROOKE WILLIAMS DO
Hospitalist
3333 SILAS CREEK PKWY
WINSTON SALEM, NC 27103
Forsyth County (336) 718-8383
BONNIE LYNN GAUDIN PA
Physician Assistant (Medical)
3333 SILAS CREEK PKWY, EMERGENCY DEPARTMENT
WINSTON SALEM, NC 27103
Forsyth County (336) 275-3325
RALPH DENTON UPDYKE JR. PA
Physician Assistant
3333 SILAS CREEK PKWY
WINSTON SALEM, NC 27103
Forsyth County (336) 718-7041
DR. DENNIS WARREN ROSS MD
Pathology (Hematology)
3333 SILAS CREEK PKWY
WINSTON-SALEM, NC 27103
Forsyth County (336) 718-3737
MR. KYLE TIMOTHY ROBERTS PA
Physician Assistant
3333 SILAS CREEK PKWY
WINSTON SALEM, NC 27103
Forsyth County (336) 718-7080
JUAN CARLOS VARELA M.D., PHD
Internal Medicine (Hematology)
3333 SILAS CREEK PKWY
WINSTON SALEM, NC 27103
Forsyth County (336) 718-5570
DR. MARIE HUFFMASTER THOMAS FNP-C
Nurse Practitioner (Family)
3333 SILAS CREEK PKWY
WINSTON SALEM, NC 27103
Forsyth County (336) 718-5000

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 Josiah An's NPI number?

The NPI number for Josiah An is 1053791517. It was assigned to this individual provider in the NPPES registry on May 31, 2015.

Where is Josiah An located?

Josiah An practices at 3333 Silas Creek Pkwy, Winston Salem, NC 27103. The listed phone number is (336) 277-8800.

What is Josiah An's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Josiah An enrolled in Medicare?

Yes. Josiah An 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.

Which organizations bill Medicare for Josiah An's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Josiah An reassigns Medicare benefits to 3 organizations: Southern California Permanente Medical Group (San Diego, CA), Kaiser Foundation Health Plan Of Washington (Renton, WA) and Hawaii Permanente Medical Group Inc (Honolulu, HI). Each 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 Josiah An's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Josiah An affiliated with any hospitals?

According to CMS data, Josiah An is affiliated with Novant Health Thomasville Medical Center.

When was this NPI record last updated?

The NPPES record for Josiah An was last updated on December 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.