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WILLIAM MA MD
NPI 1396854345
Pediatrics in Indianapolis, IN

Active since August 30, 2006PECOS Enrolled
ESKENAZI HEALTH CENTER W 38TH ST, INDIANAPOLIS, IN 46254(317) 880-3838(317) 880-0081 Get Directions Write a Review

NPPES record last updated: April 6, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 6, 2026, Jan 15, 2026 (2 updates tracked since 2026).

About William Ma Md NPPES

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

WILLIAM MA MD (NPI 1396854345) is an individual pediatrics provider in Indianapolis, Indiana, licensed in Indiana (01059342A) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1396854345
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameWILLIAM MACredential: MD
Location AddressESKENAZI HEALTH CENTER W 38TH STIndianapolis, IN 46254-2919
Mailing AddressPo Box 637764Cincinnati, OH 45263-7764 · (317) 274-1201 · Fax (317) 278-9905
Phone(317) 880-3838
Fax(317) 880-0081
Sole ProprietorNo
Enumeration DateAugust 30, 2006
Last NPPES UpdateApril 6, 20262 updates tracked since enumeration
NPPES CertifiedApril 6, 2026
✔ NPI 1396854345 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in IN · 01059342A
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Also ListedAnesthesiology · Critical Care MedicineTaxonomy 207LC0200X · License 01059342 (IN)
Also ListedPediatrics · Pediatric Critical Care MedicineTaxonomy 2080P0203X · License 01059342 (IN)
ESKENAZI HEALTH CENTER W 38TH ST, Indianapolis, IN 46254
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Other Identifiers 3

Medicaid200492900IN
Medicaid300005499IN
Medicaid207488305MO

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Ma 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 Reassignments

2

Medicare enrollment records show William Ma reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The Health And Hospital Corporation Of Marion County
0.1 mi
Nurse Practitioner
720 ESKENAZI AVE
Indianapolis, IN 46202
  • Reassigned Medicare billing, Indiana enrollment
  • 564 clinicians in this Medicare group
NPI 1104027879 (317) 880-4082
Sanford Medical Center Fargo
726 mi
Rural Health
336 MAIN STREET
Forman, ND 58032
  • Reassigned Medicare billing, North Dakota enrollment
  • 1,464 clinicians in this Medicare group
NPI 1073520003 (701) 724-3221

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 46254 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
$82.04 typical visit price
range $53.07 – $161.76
Typical copayment $20.51 (range $13.26 – $40.44)
Most-billed visit code 99203
Established Patient
$94.22 typical visit price
range $16.93 – $132.22
Typical copayment $23.55 (range $4.23 – $33.05)
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.

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 William Ma's NPI number?

The NPI number for William Ma is 1396854345. It was assigned to this individual provider in the NPPES registry on August 30, 2006.

Where is William Ma located?

William Ma practices at Eskenazi Health Center W 38th St, Indianapolis, IN 46254. The listed phone number is (317) 880-3838.

What is William Ma's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is William Ma enrolled in Medicare?

Yes. William Ma is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Ma's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Ma reassigns Medicare benefits to 2 organizations: The Health And Hospital Corporation Of Marion County (Indianapolis, IN) and Sanford Medical Center Fargo (Forman, ND). 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 William Ma's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Ma accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Anthem Blue Cross and Blue Shield and CareSource list William Ma as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for William Ma was last updated on April 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.