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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

TONYA L GRAY MD
NPI 1427164201
Family Medicine in Mason City, IA

Active since August 22, 2006PECOS EnrolledAccepts Medicare Assignment
1010 4TH ST SW, MASON CITY, IA 50401(641) 422-6020(641) 422-7803 Get Directions Write a Review

NPPES record last updated: August 3, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 3, 2026, Jul 8, 2025, Sep 1, 2020 (3 updates tracked since 2020).

About Tonya L Gray Md NPPES

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

TONYA L GRAY MD (NPI 1427164201) is an individual family medicine provider in Mason City, Iowa, licensed in Iowa (MD-35644) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, is affiliated with Mercyone North Iowa Medical Center, and is a graduate of University Of Iowa, Rj & L Carver College Of Medicine (1998).

NPPES Registry Identity

NPI1427164201
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameTONYA L GRAYCredential: MD
Location Address1010 4TH ST SWMason City, IA 50401-2857
Mailing Address621 S Illinois Ave Ste 103Mason City, IA 50401-5489 · (641) 494-3041 · Fax (641) 494-3059
Phone(641) 422-6020
Fax(641) 422-7803
Sole ProprietorNo
Medical School CMSUniversity Of Iowa, Rj & L Carver College Of MedicineGraduated 1998
Enumeration DateAugust 22, 2006
Last NPPES UpdateAugust 3, 20263 updates tracked since enumeration
NPPES CertifiedAugust 3, 2026
✔ NPI 1427164201 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in IA · MD-35644
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
1010 4TH ST SW, Mason City, IA 50401
Open in Google Maps ↗

Other Identifiers 2

Other37238IA · Wellmark
Medicaid0447698IA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan and more.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

Tonya L Gray 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 ID9739157587
PECOS Enrollment IDI20040920001265
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 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.
278 services181 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
153 services153 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
65 services51 patients
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.
53 services43 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
18 services18 patients

Hospital Affiliations CMS Care Compare

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

Mercyone North Iowa Medical Center

Acute Care Hospitals · Mason City, IA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number160064
Location1000 Fourth Street SWMason City, IA 50401 · Cerro Gordo County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 50401 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
$81.84 typical visit price
range $52.96 – $161.40
Typical copayment $20.46 (range $13.24 – $40.35)
Most-billed visit code 99203
Established Patient
$94.05 typical visit price
range $16.91 – $131.98
Typical copayment $23.51 (range $4.22 – $32.99)
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.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
6 suppliers31 claims44 services$6.29 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
1 supplier15 claims15 services$202.90 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

LAURA SPICER
Pharmacist
1010 4TH ST SW
MASON CITY, IA 50401
Cerro Gordo County (641) 422-6105
DR. CHAD M MCCAMBRIDGE MD
Family Medicine
1010 4TH ST SW, SUITE 340
MASON CITY, IA 50401
Cerro Gordo County (641) 428-7766
SIDDHARTH VERMA DO
Student in an Organized Health Care Education/Training Program
1010 4TH ST SW, STE 305
MASON CITY, IA 50401
Cerro Gordo County (641) 428-5700
LUAN M BARGMAN PA
Physician Assistant
1010 4TH ST SW, SUITE 120
MASON CITY, IA 50401
Cerro Gordo County (641) 428-6020
MAGNETIC RESONANCE SERVICES PTR
Clinic/Center (Magnetic Resonance Imaging (MRI))
1010 4TH ST SW, SUITE 100
MASON CITY, IA 50401
Cerro Gordo County (641) 424-0102
WILLIAM D MATTHEWS M.D.
Radiology (Diagnostic Radiology)
1010 4TH ST SW, SUITE 100
MASON CITY, IA 50401
Cerro Gordo County (641) 424-0102
MR. TONY GENE PALS PHARMD
Pharmacist
1010 4TH ST SW
MASON CITY, IA 50401
Cerro Gordo County (641) 422-6105
DANIEL MICHELSON MD
Student in an Organized Health Care Education/Training Program
1010 4TH ST SW, STE 340
MASON CITY, IA 50401
Cerro Gordo County (641) 428-7766

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 Tonya Gray's NPI number?

The NPI number for Tonya Gray is 1427164201. It was assigned to this individual provider in the NPPES registry on August 22, 2006.

Where is Tonya Gray located?

Tonya Gray practices at 1010 4th St SW, Mason City, IA 50401. The listed phone number is (641) 422-6020.

What is Tonya Gray's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Tonya Gray enrolled in Medicare?

Yes. Tonya Gray 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 Tonya Gray accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Home State Health, Ambetter from NH Healthy Families and Ambetter from Sunflower Health Plan and 2 other insurers list Tonya Gray 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 Tonya Gray affiliated with any hospitals?

According to CMS data, Tonya Gray is affiliated with Mercyone North Iowa Medical Center.

When was this NPI record last updated?

The NPPES record for Tonya Gray was last updated on August 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 days 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.