1. Home
  2. Directory
  3. Arizona
  4. Winslow
  5. Emergency Medicine
  6. NPI Profile

THAYER STARR PHELAN MD
NPI 1821209354
Emergency Medicine in Winslow, AZ

Active since May 25, 2007PECOS EnrolledAccepts Medicare Assignment
28.55/100
CMS Quality Rating
1501 N WILLIAMSON AVE, WINSLOW, AZ 86047(928) 289-4691 Get Directions Write a Review

NPPES record last updated: December 10, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Dec 10, 2025, Nov 19, 2025, Oct 11, 2023 and 1 more (4 updates tracked since 2022).

About Thayer Starr Phelan Md NPPES

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

THAYER STARR PHELAN MD (NPI 1821209354) is an individual emergency medicine provider in Winslow, Arizona, licensed in Colorado (DR.0053427) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS, is affiliated with Jacksonville Memorial Hospital, and maintains a secondary practice location in Bloomington.

NPPES Registry Identity

NPI1821209354
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameTHAYER STARR PHELANCredential: MD
Location Address1501 N WILLIAMSON AVEWinslow, AZ 86047-2735
Mailing Address250 N Shadeland AveIndianapolis, IN 46219-4959
Phone(928) 289-4691
Sole ProprietorNo
Medical School CMSOtherGraduated 2007
Enumeration DateMay 25, 2007
Last NPPES UpdateDecember 10, 20254 updates tracked since enumeration
NPPES CertifiedDecember 10, 2025
✔ NPI 1821209354 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in CO · DR.0053427✔ Licensed in AZ · 75374✔ Licensed in IN · 01098090A
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
1501 N WILLIAMSON AVE, Winslow, AZ 86047
Open in Google Maps ↗

Secondary Practice Location 1

Location 12651 E Discovery PkwyBloomington, IN 47408-9059 · Phone (812) 353-9515

Other Identifiers 1

Medicaid09892LA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona, Medica.Insurance ›

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

Thayer Starr Phelan 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 ID6305029646
PECOS Enrollment IDI20131210000592, I20250120000700, I20251124003515
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 5

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 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.
65 services64 patients
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.
30 services30 patients
Automated urinalysis test 81003
An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.
24 services24 patients
Detection test by immunoassay with direct visual observation for influenza virus 87804
This is a test that identifies the influenza virus in your body. It works by using an immunoassay, a method that detects the presence of the virus through an immune response. The results are directly observable, making it a quick and efficient way to diagnose flu.
21 services11 patients
Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen 87635
This is a lab test that detects the presence of COVID-19 in your body. It uses a technique to amplify the virus's genetic material, either DNA or RNA, making it easier to identify. A positive result indicates an active infection.
12 services12 patients

Hospital Affiliations CMS Care Compare 4

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

Jacksonville Memorial Hospital

Critical Access Hospitals · Jacksonville, IL
OwnershipVoluntary non-profit - Private
CMS Certification Number141352
Location1600 W Walnut StJacksonville, IL 62650 · Morgan County
Emergency services

Indiana University Health Bloomington Hospital

Acute Care Hospitals · Bloomington, IN
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150051
Location2651 East Discovery ParkwayBloomington, IN 47408 · Monroe County
Emergency services Birthing friendly

Indiana University Health Bedford Hospital

Critical Access Hospitals · Bedford, IN
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number151328
Location2900 W 16th StBedford, IN 47421 · Lawrence County
Emergency services

Northern Light Maine Coast Hospital

Acute Care Hospitals · Ellsworth, ME
1/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number200050
Location50 Union StreetEllsworth, ME 04605 · Hancock County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 86047 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
$85.89 typical visit price
range $55.44 – $168.60
Typical copayment $21.47 (range $13.86 – $42.15)
Most-billed visit code 99203
Established Patient
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

28.55/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality21.38
Improvement Activities0
Cost55.97

Other Providers at the Same Location NPPES 14

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

JASON LAMAR TAYLOR DO
Emergency Medicine
1501 N WILLIAMSON AVE
WINSLOW, AZ 86047
Navajo County (928) 289-4691
CATERINA PALUMBO MD
Emergency Medicine
1501 N WILLIAMSON AVE
WINSLOW, AZ 86047
Navajo County (720) 848-0000
EMCARE PHYSICIAN PROVIDERS, INC
Emergency Medicine
1501 N WILLIAMSON AVE, EMERGENCY DEPARTMENT
WINSLOW, AZ 86047
Navajo County (928) 289-4691
RALPH E DAY MD
Emergency Medicine
1501 N WILLIAMSON AVE, EMERGENCY DEPARTMENT
WINSLOW, AZ 86047
Navajo County (928) 289-4691
DALE NORTON
Nurse Practitioner (Family)
1501 N WILLIAMSON AVE
WINSLOW, AZ 86047
Navajo County (928) 289-4691
WILLIAM K KVIEN MD
Emergency Medicine
1501 N WILLIAMSON AVE, EMERGENCY DEPARTMENT
WINSLOW, AZ 86047
Navajo County (928) 289-4691
WINSLOW INDIAN HEALTH CARE GROUP
Clinic/Center
1501 N WILLIAMSON AVE
WINSLOW, AZ 86047
Navajo County (928) 289-4691
DR. BRYAN ANDREW FEINSTEIN MD
Emergency Medicine
1501 N WILLIAMSON AVE
WINSLOW, AZ 86047
Navajo County (928) 289-4691

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 Thayer Phelan's NPI number?

The NPI number for Thayer Phelan is 1821209354. It was assigned to this individual provider in the NPPES registry on May 25, 2007.

Where is Thayer Phelan located?

Thayer Phelan practices at 1501 N Williamson Ave, Winslow, AZ 86047. The listed phone number is (928) 289-4691.

What is Thayer Phelan's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Thayer Phelan enrolled in Medicare?

Yes. Thayer Phelan 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.

What insurance does Thayer Phelan accept?

Health plans from Blue Cross Blue Shield of Arizona and Medica list Thayer Phelan 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 Thayer Phelan affiliated with any hospitals?

According to CMS data, Thayer Phelan is affiliated with Jacksonville Memorial Hospital, Indiana University Health Bloomington Hospital, Indiana University Health Bedford Hospital and Northern Light Maine Coast Hospital.

When was this NPI record last updated?

The NPPES record for Thayer Phelan was last updated on December 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.