Jonathan Edward Riordan , PA-S
Physician Assistant • Atlanta, GA
275 Collier Rd Nw Ste 300
Atlanta, GA 303091740
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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Jonathan Riordan is listed in NPPES under Physician Assistant.
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NPI assigned on May 13, 2021; this date does not establish years in practice.
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Published CMS data list 18 Original Medicare Part B services in 2023.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2023. Published rows only; this is not a quality measure.
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Published Part B service records, 2023:
- 99291 — Critical care: 18 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2023. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2022 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2023). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Medicare Part B services went from 20 in 2021 to 18 in 2023.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2021–2023.
Practice Location & Contact Primary Location
275 Collier Rd Nw Ste 300
Atlanta, GA 303091740
NPPES lists 1 additional practice-address record in Atlanta, GA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Piedmont Specialty Hospital Billing Llc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Mercer University School Of Medicine
2021
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $3,223 in 2023
The total amount Medicare approved for these services in 2023. 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, 2023.
Paid by Medicare
About $2,495 in 2023
The part of the Medicare-allowed amount that Medicare itself paid in 2023, 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, 2023.
Open Payments general payments, program year 2025
All general payments: $33.65 across 2 records.
By nature of payment
- Food and Beverage: $33.65 across 2 records.
Reporting-company totals
- GlaxoSmithKline, LLC.: $33.65 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 2025 (published June 30, 2026).
Years since graduation
5 years (graduated 2021)
CMS Doctors and Clinicians data list 2021 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.
NPI first issued
2021
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; 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)
Jonathan Riordan 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 Jonathan Riordan 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 Atlanta and Georgia
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Jonathan Riordan are from 2023.
1,186 active clinicians are listed under Physician Assistant with a practice address in Atlanta, GA (4,665 in Georgia).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Atlanta
9.2% of these 1,186 clinicians have the CMS telehealth indicator.
53.5% of these 1,186 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 decreased 10% from 20 in 2021 to 18 in 2023.
- 2021: 20
- 2022: 89
- 2023: 18
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Medicare-allowed amount
Medicare-allowed amount decreased 13% from $3,720 in 2021 to $3,223 in 2023.
- 2021: $3,720
- 2022: $11,233
- 2023: $3,223
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Paid by Medicare
Paid by Medicare decreased 16% from $2,976 in 2021 to $2,495 in 2023.
- 2021: $2,976
- 2022: $8,942
- 2023: $2,495
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $13.32 in 2022 to $33.65 in 2025.
- 2022: $13.32
- 2023: $18.34
- 2025: $33.65
Sources: CMS Medicare Physician & Other Practitioners (2023), CMS Open Payments (2025), 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 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $33.65.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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TRELEGY ELLIPTA | General | $18.88 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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TRELEGY ELLIPTA | General | $14.77 |
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 2020–2022 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, 2021–2023; 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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99291
Critical care, first 30-74 minutes
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18 | 17 | $762.00 | $179.04 |
Source: CMS Part B by Provider and Service, 2023; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2021-09-14NUCC 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.
NUCC Taxonomy Code: 363AM0700X
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20210908002329
GA
1658777107
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
Piedmont Specialty Hospital Billing Llc
745 Poplar Rd, Newnan, GA 302651618
Phone: 7704001000
Piedmont Specialty Hospital Billing Llc
5126 Hospital Dr Ne, Covington, GA 300142566
Phone: 7707867053
Piedmont Specialty Hospital Billing Llc
1412 Milstead Ave Ne, Conyers, GA 300123877
Phone: 7709183000
Piedmont Specialty Hospital Billing Llc
1133 Eagles Landing Pkwy, Stockbridge, GA 302815085
Phone: 6786041000
Secondary Practice Locations
1968 Peachtree Rd Nw
Atlanta, GA 303091281
Phone: 7705845269
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
PAS
Internal Medicine - Critical Care Medicine
Doctor of Medicine (M.D.)
Physician Assistant - Medical
MMSC, Physician Assistant (Certified)
Physician Assistant
Physician Assistant (Certified)
Physician Assistant
Physician Assistant
Nurse Practitioner
Nurse Practitioner
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 275 COLLIER RD NW STE 300, ATLANTA, GA 303091740 (Tel: 4043500009)
NPI status registered as active in NPPES database
Registered at 1968 PEACHTREE RD NW, ATLANTA, GA 303091281 (Tel: 7705845269)
Registered at 1011 RIDGECREST DR SE, SMYRNA, GA 300804230
Recorded as JONATHAN RIORDAN, PA-S
Physician Assistant
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Atlanta
- Marita King, PA-C
- Lauren Lapihuska, PA-C
- Rachel Fergus, PA-C
- Chhavi Lal, PA
- Michele Volansky, PA-C
- Deborah Targonski, PA
Mailing Address
1011 Ridgecrest Dr Se
Smyrna, GA 300804230