Dr. Nathan K Hatfield , DO
Internal Medicine • Mesa, AZ
6820 E Brown Rd
Mesa, AZ 852073705
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Nathan Hatfield is listed in NPPES under Internal Medicine.
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NPI assigned on April 26, 2017; this date does not establish years in practice.
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Published CMS data list 888 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 — Established patient outpatient office visit: 220 service units.
- G2211 — Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's: 184 service units.
- G0439 — Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit: 88 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 16 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 3,341 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Atorvastatin Calcium — 207 prescription fills, including refills.
- Levothyroxine Sodium — 160 prescription fills, including refills.
- Rosuvastatin Calcium — 160 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 83 records in the table · Guide: How to read Medicare Part D prescriber data
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Close to the middle for Medicare Part B services among clinicians listed under Internal Medicine in Mesa, AZ (2024, 90 clinicians with data). Median for this group: 749. Middle half: 334 to 1,317.
More Medicare Part B services than 60% of clinicians listed under Internal Medicine in Arizona (2024, 1,493 clinicians with data). Median for this group: 655. Middle half: 240 to 1,410.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 887 in 2020 to 888 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
6820 E Brown Rd
Mesa, AZ 852073705
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Mesa, AZ. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Honorhealth Medical Group, Llc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
Edward Via Col Of Osteo Medicine-Virginia Campus
2017
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
192 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $51,319 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $40,736 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
7,961 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$298,981 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $135.49 across 2 records.
By nature of payment
- Food and Beverage: $135.49 across 2 records.
Reporting-company totals
- Tempus AI, Inc: $115.29 across 1 record.
- Exact Sciences Corporation: $20.20 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
9 years (graduated 2017)
CMS Doctors and Clinicians data list 2017 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
NPI first issued
2017
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, “Does your provider accept Medicare as full payment?”
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Dr. Hatfield has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Hatfield as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Mesa and Arizona
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Close to the middle for clinicians listed under Internal Medicine in Mesa, AZ (2024, 90 clinicians with data). Median for this group: 749. Middle half: 334 to 1,317.
More Medicare Part B services than 60% of clinicians listed under Internal Medicine in Arizona (2024, 1,493 clinicians with data). Median for this group: 655. Middle half: 240 to 1,410.
Medicare-allowed amount
A lower Medicare-allowed amount than 65% of clinicians listed under Internal Medicine in Mesa, AZ (2024, 90 clinicians with data). Median for this group: $75,170. Middle half: $41,832 to $134,532.
Close to the middle for clinicians listed under Internal Medicine in Arizona (2024, 1,493 clinicians with data). Median for this group: $64,797. Middle half: $24,080 to $129,921.
Paid by Medicare
A lower Medicare payment amount than 60% of clinicians listed under Internal Medicine in Mesa, AZ (2024, 90 clinicians with data). Median for this group: $58,659. Middle half: $32,066 to $110,006.
Close to the middle for clinicians listed under Internal Medicine in Arizona (2024, 1,493 clinicians with data). Median for this group: $48,780. Middle half: $18,164 to $101,080.
Medicare Part D prescriptions
More Part D prescriptions than 70% of clinicians listed under Internal Medicine in Mesa, AZ (2024, 97 clinicians with data). Median for this group: 681. Middle half: 146 to 4,961.
More Part D prescriptions than 70% of clinicians listed under Internal Medicine in Arizona (2024, 1,547 clinicians with data). Median for this group: 848. Middle half: 130 to 4,070.
Part D drug cost
A higher Part D drug cost than 65% of clinicians listed under Internal Medicine in Mesa, AZ (2024, 97 clinicians with data). Median for this group: $33,316. Middle half: $5,134 to $417,039.
A higher Part D drug cost than 70% of clinicians listed under Internal Medicine in Arizona (2024, 1,547 clinicians with data). Median for this group: $58,124. Middle half: $6,357 to $317,963.
165 active clinicians are listed under Internal Medicine with a practice address in Mesa, AZ (2,908 in Arizona).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Mesa
15.2% of these 165 clinicians have the CMS telehealth indicator.
61.8% of these 165 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services varied from year to year: 887 in 2020 and 888 in 2024.
- 2020: 887
- 2021: 12,929
- 2022: 6,109
- 2023: 3,957
- 2024: 888
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Medicare-allowed amount
Medicare-allowed amount decreased 28% from $71,219 in 2020 to $51,319 in 2024.
- 2020: $71,219
- 2021: $939,529
- 2022: $239,584
- 2023: $90,437
- 2024: $51,319
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Paid by Medicare
Paid by Medicare decreased 30% from $57,980 in 2020 to $40,736 in 2024.
- 2020: $57,980
- 2021: $757,116
- 2022: $193,327
- 2023: $79,101
- 2024: $40,736
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 1522% from 206 in 2020 to 3,341 in 2024.
- 2020: 206
- 2021: 4,465
- 2022: 6,236
- 2023: 3,601
- 2024: 3,341
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30-day fills
30-day fills increased 1549% from 483 in 2020 to 7,961 in 2024.
- 2020: 483
- 2021: 11,143
- 2022: 16,209
- 2023: 8,856
- 2024: 7,961
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Part D drug cost
Part D drug cost increased 9099% from $3,250 in 2020 to $298,981 in 2024.
- 2020: $3,250
- 2021: $165,913
- 2022: $317,753
- 2023: $198,623
- 2024: $298,981
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $21.37 in 2021 to $135.49 in 2025.
- 2021: $21.37
- 2025: $135.49
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $135.49.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Tempus AI, Inc |
Food and Beverage
In-kind items and services
|
XT CDX | General | $115.29 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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Cologuard Collection Kit | General | $20.20 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2019–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2020–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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220 | 129 | $292.00 | $123.54 |
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G2211
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
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184 | 111 | $32.00 | $15.83 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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88 | 88 | $298.00 | $123.82 |
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80053
Blood test, comprehensive group of blood chemicals
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53 | 45 | $31.00 | $10.35 |
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80061
Blood test, lipids (cholesterol and triglycerides)
|
50 | 43 | $40.00 | $12.96 |
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85025
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count
|
49 | 43 | $20.00 | $7.61 |
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36415
Insertion of needle into vein for collection of blood sample
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48 | 46 | $17.00 | $8.47 |
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84443
Blood test, thyroid stimulating hormone (tsh)
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40 | 37 | $50.00 | $16.46 |
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83036
Hemoglobin a1c level
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36 | 28 | $25.00 | $9.26 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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36 | 34 | $206.00 | $85.88 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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18 | 18 | $376.00 | $153.28 |
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82607
Cyanocobalamin (vitamin b-12) level
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16 | 14 | $60.00 | $14.78 |
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87428
Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza
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14 | 14 | $131.00 | $68.88 |
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93000
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
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14 | 14 | $34.00 | $13.82 |
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82043
Urine microalbumin (protein) level
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11 | 11 | $12.00 | $5.66 |
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82570
Creatinine level to test for kidney function or muscle injury
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11 | 11 | $11.00 | $5.08 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 207 | 17,419 | $2,336.63 | 67 |
| Levothyroxine Sodium | Levothyroxine Sodium | 160 | 13,431 | $1,886.76 | 51 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 160 | 13,001 | $2,120.51 | 56 |
| Lisinopril | Lisinopril | 149 | 12,287 | $982.91 | 54 |
| Amlodipine Besylate | Amlodipine Besylate | 146 | 12,647 | $810.27 | 49 |
| Pantoprazole Sodium | Pantoprazole Sodium | 128 | 10,560 | $2,018.31 | 52 |
| Losartan Potassium | Losartan Potassium | 116 | 9,840 | $1,214.49 | 42 |
| Metformin Hcl | Metformin Hcl | 100 | 8,551 | $826.52 | 37 |
| Gabapentin | Gabapentin | 84 | 5,880 | $1,797.81 | 29 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 75 | 1,964 | $2,128.50 | 34 |
| Tamsulosin Hcl | Tamsulosin Hcl | 66 | 5,840 | $950.22 | 27 |
| Pravastatin Sodium | Pravastatin Sodium | 61 | 5,500 | $919.28 | 20 |
| Simvastatin | Simvastatin | 59 | 4,870 | $640.61 | 18 |
| Escitalopram Oxalate | Escitalopram Oxalate | 56 | 3,696 | $662.87 | 15 |
| Fluticasone Propionate | Fluticasone Propionate | 54 | 3,070 | $576.17 | 30 |
| Metoprolol Tartrate | Metoprolol Tartrate | 53 | 4,710 | $466.10 | 18 |
| Prednisone | Prednisone | 51 | 480 | $119.95 | 35 |
| Metoprolol Succinate | Metoprolol Succinate | 49 | 4,200 | $515.21 | 19 |
| Omeprazole | Omeprazole | 48 | 4,274 | $571.36 | 18 |
| Hydrochlorothiazide | Hydrochlorothiazide | 47 | 4,170 | $297.54 | 18 |
| Allopurinol | Allopurinol | 45 | 3,870 | $504.47 | 13 |
| Famotidine | Famotidine | 43 | 2,876 | $551.43 | 16 |
| Eliquis | Apixaban | 43 | 2,473 | $48,303.42 | 13 |
| Alendronate Sodium | Alendronate Sodium | 42 | 3,528 | $480.51 | 17 |
| Carvedilol | Carvedilol | 42 | 2,903 | $485.80 | 13 |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-09-25NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
NUCC Taxonomy Code: 390200000X
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20200812001318
AZ
5193141802
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
Honorhealth Medical Group, Llc
10238 E Hampton Ave, Mesa, AZ 852093319
Phone: 4808224750
Honorhealth Medical Group, Llc
3645 S Rome St, Gilbert, AZ 852977338
Honorhealth Medical Group, Llc
9327 N 3rd St, Phoenix, AZ 850202471
Phone: 6023713100
Secondary Practice Locations
1301 S Crismon Rd
Mesa, AZ 852093767
Phone: 4803586100
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Family Nurse Practitioner (Certified)
Family Medicine
Doctor of Osteopathic Medicine (D.O.)
Family Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Osteopathic Medicine (D.O.)
Physician Assistant
Physician Assistant (Certified)
Family Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 6820 E BROWN RD, MESA, AZ 852073705 (Tel: 4807181285)
Registered at PO BOX 7060, CHANDLER, AZ 852467060 (Tel: 4807181285)
Additional practice office at 1301 S Crismon Rd, Mesa, AZ 852093767
NPI status registered as active in NPPES database
Registered at 1301 S CRISMON RD, MESA, AZ 852093767 (Tel: 4803586100)
Registered at 425 N 39TH WAY, MESA, AZ 852056901 (Tel: 4804374429)
Recorded as NATHAN HATFIELD, D.O.
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Mesa
- Dr. Chikwendu Nwosu, MD
- Firas Abbas, MDMPH
- Dr. Muhammad Alam, MD
- Dr. Ashley Vallesarmand, MD
- Dr. Lalith Kumar Gande, MD
- Dr. Robert Arashahi, MD
More public profiles in Arizona
Directory navigation, in NPI number order.
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- Amy Tempkin, MD Radiology - Diagnostic Radiology · Tucson
- Thomas Dahl, DC, FI, ACA Chiropractor · Phoenix
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- Navdeep Gill, OD Optometrist · Glendale
- Tanya Underwood, DO Psychiatry & Neurology - Psychiatry · Cortaro
- Timothy Wilson, DDS Dentist - General Practice · Tucson
- Allistair Ray, DDS Dentist · Gilbert
Mailing Address
Po Box 7060
Chandler, AZ 852467060
Phone: 4807181285