Michael Edward Callahan , PA-C
Physician Assistant • Reno, NV
10509 Professional Cir Ste 101
Reno, NV 895214883
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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Michael Callahan is listed in NPPES under Physician Assistant.
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NPI assigned on June 10, 2019; this date does not establish years in practice.
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Published CMS data list 2,763 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:
- 99310 — Subsequent nursing facility care with high level of medical decision making, per day: 1,293 service units.
- G0317 — Prolonged nursing facility evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by the physician or qualifi: 677 service units.
- 99309 — Subsequent nursing facility care with moderate level of medical decision making, per day: 665 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 4 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 291 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:
- Levothyroxine Sodium — 27 prescription fills, including refills.
- Atorvastatin Calcium — 26 prescription fills, including refills.
- Furosemide — 26 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 17 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 90% of clinicians listed under Physician Assistant in Reno, NV (2024, 132 clinicians with data). Median for this group: 381. Middle half: 160 to 873.
More Medicare Part B services than 85% of clinicians listed under Physician Assistant in Nevada (2024, 551 clinicians with data). Median for this group: 239. Middle half: 99 to 900.
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 370 in 2020 to 2,763 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
10509 Professional Cir Ste 101
Reno, NV 895214883
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
434 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 $252,493 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 $199,538 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
291 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
$10,804 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 2024
All general payments: $61.01 across 2 records.
By nature of payment
- Food and Beverage: $61.01 across 2 records.
Reporting-company totals
- ABIOMED: $61.01 across 2 records.
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 2024 (published June 30, 2026).
NPI first issued
2019
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Michael Callahan 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 Michael Callahan 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 Reno and Nevada
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 90% of clinicians listed under Physician Assistant in Reno, NV (2024, 132 clinicians with data). Median for this group: 381. Middle half: 160 to 873.
More Medicare Part B services than 85% of clinicians listed under Physician Assistant in Nevada (2024, 551 clinicians with data). Median for this group: 239. Middle half: 99 to 900.
Medicare-allowed amount
A higher Medicare-allowed amount than 95% of clinicians listed under Physician Assistant in Reno, NV (2024, 132 clinicians with data). Median for this group: $29,997. Middle half: $14,291 to $62,844.
A higher Medicare-allowed amount than 95% of clinicians listed under Physician Assistant in Nevada (2024, 551 clinicians with data). Median for this group: $19,039. Middle half: $8,218 to $51,606.
Paid by Medicare
A higher Medicare payment amount than 95% of clinicians listed under Physician Assistant in Reno, NV (2024, 132 clinicians with data). Median for this group: $20,311. Middle half: $10,562 to $46,188.
A higher Medicare payment amount than 95% of clinicians listed under Physician Assistant in Nevada (2024, 551 clinicians with data). Median for this group: $14,357. Middle half: $5,921 to $37,821.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Physician Assistant in Reno, NV (2024, 148 clinicians with data). Median for this group: 254. Middle half: 118 to 1,203.
Close to the middle for clinicians listed under Physician Assistant in Nevada (2024, 617 clinicians with data). Median for this group: 324. Middle half: 94 to 1,300.
Part D drug cost
Close to the middle for clinicians listed under Physician Assistant in Reno, NV (2024, 148 clinicians with data). Median for this group: $3,407. Middle half: $1,084 to $73,027.
Close to the middle for clinicians listed under Physician Assistant in Nevada (2024, 617 clinicians with data). Median for this group: $7,774. Middle half: $876 to $106,842.
234 active clinicians are listed under Physician Assistant with a practice address in Reno, NV (1,084 in Nevada).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Reno
12.8% of these 234 clinicians have the CMS telehealth indicator.
70.5% of these 234 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 increased 647% from 370 in 2020 to 2,763 in 2024.
- 2020: 370
- 2021: 1,757
- 2022: 3,046
- 2023: 3,207
- 2024: 2,763
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Medicare-allowed amount
Medicare-allowed amount increased 799% from $28,092 in 2020 to $252,493 in 2024.
- 2020: $28,092
- 2021: $149,307
- 2022: $263,011
- 2023: $267,129
- 2024: $252,493
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Paid by Medicare
Paid by Medicare increased 818% from $21,739 in 2020 to $199,538 in 2024.
- 2020: $21,739
- 2021: $119,229
- 2022: $204,466
- 2023: $209,916
- 2024: $199,538
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 89% from 154 in 2020 to 291 in 2024.
- 2020: 154
- 2021: 102
- 2022: 440
- 2023: 356
- 2024: 291
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30-day fills
30-day fills increased 81% from 161 in 2020 to 291 in 2024.
- 2020: 161
- 2021: 102
- 2022: 451
- 2023: 364
- 2024: 291
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Part D drug cost
Part D drug cost increased 505% from $1,785 in 2020 to $10,804 in 2024.
- 2020: $1,785
- 2021: $1,066
- 2022: $17,480
- 2023: $16,388
- 2024: $10,804
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $30.30 in 2021 to $61.01 in 2024.
- 2021: $30.30
- 2022: $192.79
- 2024: $61.01
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, 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 2024 (payments made January 1 – December 31, 2024): fewer than 11 records totaling $61.01.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ABIOMED |
Food and Beverage
Cash or cash equivalent
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Impella | General | $34.06 |
| ABIOMED |
Food and Beverage
Cash or cash equivalent
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Impella | General | $26.95 |
Source: CMS Open Payments, program year 2024, 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 2018–2023 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, 2019–2024; 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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99310
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes
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1,293 | 416 | $188.71 | $126.19 |
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G0317
Prolonged nursing facility evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by the physician or qualifi
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677 | 159 | $44.00 | $24.77 |
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99309
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes
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665 | 316 | $164.00 | $88.45 |
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99316
Nursing facility discharge management, more than 30 minutes
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128 | 125 | $177.00 | $107.35 |
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 |
|---|---|---|---|---|---|
| Levothyroxine Sodium | Levothyroxine Sodium | 27 | 769 | $225.09 | 19 |
| Atorvastatin Calcium | Atorvastatin Calcium | 26 | 730 | $213.25 | 17 |
| Furosemide | Furosemide | 26 | 615 | $117.09 | 26 |
| Lisinopril | Lisinopril | 24 | 632 | $136.99 | 13 |
| Amlodipine Besylate | Amlodipine Besylate | 24 | 646 | $180.93 | 15 |
| Gabapentin | Gabapentin | 17 | 467 | $139.42 | 17 |
| Potassium Chloride | Potassium Chloride | 17 | 374 | $271.84 | 17 |
| Eliquis | Apixaban | 15 | 429 | $8,006.65 | 14 |
| Mirtazapine | Mirtazapine | 14 | 393 | $210.21 | — |
| Quetiapine Fumarate | Quetiapine Fumarate | 14 | 420 | $138.63 | — |
| Memantine Hcl | Memantine Hcl | 14 | 348 | $331.91 | — |
| Buspirone Hcl | Buspirone Hcl | 13 | 389 | $191.53 | — |
| Trazodone Hcl | Trazodone Hcl | 13 | 343 | $100.33 | 13 |
| Carbidopa-Levodopa | Carbidopa/Levodopa | 13 | 366 | $231.79 | — |
| Tamsulosin Hcl | Tamsulosin Hcl | 12 | 355 | $120.65 | — |
| Losartan Potassium | Losartan Potassium | 11 | 270 | $80.05 | — |
| Omeprazole | Omeprazole | 11 | 330 | $108.05 | — |
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
NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20191114000843
NV
8426480393
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant - Surgical
Physician Assistant (Certified)
Nurse Practitioner
Nurse Practitioner
Nurse Practitioner - Adult Health
Advanced Practice Nurse
Neurological Surgery
Physician Assistant (Certified)
Neurological Surgery
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated June 10, 2019.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from July 2019 to August 2026.
NPI Administrative Meta
Other Physician Assistants in Reno
- Mandy Brodegard
- Jean Hyde, PA-C
- Cecilia Bowers, PA-C
- Lisa Franks, PA-C
- Susan Jimenez, NP, PA-C
- Ryan Swanson, PA-C
Mailing Address
603 Turtle Creek Rd
Paso Robles, CA 934463666
Phone: 8056102411