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JOHN C MARXER MD
NPI 1609404631
Anesthesiology in Indianapolis, IN

Active since March 27, 2020PECOS EnrolledAccepts Medicare Assignment
1130 WEST MICHIGAN STREET, FH 204, INDIANAPOLIS, IN 46202(317) 274-0076(317) 274-0256 Get Directions Write a Review

NPPES record last updated: April 1, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 1, 2025, Jun 15, 2021, Mar 27, 2020 (3 updates tracked since 2020).

About John C Marxer Md NPPES

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

JOHN C MARXER MD (NPI 1609404631) is an individual anesthesiology provider in Indianapolis, Indiana, licensed in Indiana (01089404A) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS, is affiliated with Indiana University Health, and maintains a secondary practice location in Indianapolis.

NPPES Registry Identity

NPI1609404631
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameJOHN C MARXERCredential: MD
Location Address1130 WEST MICHIGAN STREET, FH 204Indianapolis, IN 46202-5209
Mailing Address1130 West Michigan Street, Fh 204Indianapolis, IN 46202-5209 · (317) 274-0076 · Fax (317) 274-0256
Phone(317) 274-0076
Fax(317) 274-0256
Sole ProprietorNo
Medical School CMSIndiana University School Of MedicineGraduated 2020
Enumeration DateMarch 27, 2020
Last NPPES UpdateApril 1, 20253 updates tracked since enumeration
NPPES CertifiedApril 1, 2025
✔ NPI 1609404631 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in IN · 01089404A
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1130 WEST MICHIGAN STREET, Indianapolis, IN 46202
Open in Google Maps ↗

Secondary Practice Location 1

Location 1550 University BlvdIndianapolis, IN 46202-5149 · Phone (317) 274-0275

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource, Cigna Healthcare.Insurance ›

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

John C Marxer Md 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 ID3779905641
PECOS Enrollment IDI20240722002920
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 John Marxer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Iu Health Medical Group, LLC
1.3 mi
General Practice
1701 N SENATE BLVD
Indianapolis, IN 46202
  • Reassigned Medicare billing, Indiana enrollment
  • 5,212 clinicians in this Medicare group
NPI 1326893777 (317) 962-2000

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

Hospital Affiliations CMS Care Compare

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

Indiana University Health

Acute Care Hospitals · Indianapolis, IN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150056
Location1701 N Senate BlvdIndianapolis, IN 46202 · Marion County
Emergency services Birthing friendly

Other Providers at the Same Location NPPES 6

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

DR. MICHAEL ANDREW FORD D.O.
Anesthesiology
1130 WEST MICHIGAN STREET, FESLER HALL ROOM 204
INDIANAPOLIS, IN 46202
Marion County (317) 274-0275
DAVID RYUSUKE OKANO MD
Anesthesiology
1130 WEST MICHIGAN STREET, FESLER HALL RM 204
INDIANAPOLIS, IN 46202
Marion County (317) 274-0275
JAMES WILLIAM DAGGETT
Anesthesiology
1130 WEST MICHIGAN STREET
INDIANAPOLIS, IN 46202
Marion County (317) 274-0076
MONICA RANI O'DOHERTY DO
Anesthesiology
1130 WEST MICHIGAN STREET, FESLER HALL 204
INDIANAPOLIS, IN 46202
Marion County (317) 274-0076
HARKEERAT SINGH DHAMI MD
Anesthesiology
1130 WEST MICHIGAN STREET, FESLER HALL ROOM 204
INDIANAPOLIS, IN 46202
Marion County (317) 274-0076
SYDNEY ALEXANDRA SPITLER
Anesthesiology
1130 WEST MICHIGAN STREET, FESLER HALL ROOM 204
INDIANAPOLIS, IN 46202
Marion County (317) 274-4343

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 John Marxer's NPI number?

The NPI number for John Marxer is 1609404631. It was assigned to this individual provider in the NPPES registry on March 27, 2020.

Where is John Marxer located?

John Marxer practices at 1130 West Michigan Street Fh 204, Indianapolis, IN 46202. The listed phone number is (317) 274-0076.

What is John Marxer's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is John Marxer enrolled in Medicare?

Yes. John Marxer 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 organization bills Medicare for John Marxer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Marxer reassigns Medicare benefits to Iu Health Medical Group, LLC (Indianapolis, IN). 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 John Marxer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does John Marxer accept?

Health plans from CareSource and Cigna Healthcare list John Marxer 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.

Is John Marxer affiliated with any hospitals?

According to CMS data, John Marxer is affiliated with Indiana University Health.

When was this NPI record last updated?

The NPPES record for John Marxer was last updated on April 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.