Doctor profile · Federal record
Dr. John Riordan, DC
Chiropractor (CMS: Chiropractic) · Chiropractor · Chiropractor · Chiropractor · Chiropractor · Warrensburg, MO
- NPI 1558490524
- Accepts Medicare
- 33 yrs in practice
- Licensed in 5 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
420 East Young Avenue
Warrensburg, MO 64093
(660) 422-7246
fax (660) 422-7243
Credentials & registration
- NPI registered
- March 2007 — 19 yrs on file
- Profile last updated
- March 1, 2017
- Year of graduation
- 1993 — 33 yrs since
- Specialty taxonomy
- 111N00000X — NUCC code
- State licenses (5)
- Missouri #2008033989 · Oregon #3042 · Arizona #5137 · Hawaii #991 · South Carolina #3070
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1558490524. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
569
Distinct HCPCS
2
Medicare allowed
$20,085
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
98941 |
Chiropractic manipulative treatment, 3-4 spinal regions | 476 | 67 | $37 | |
98940 |
Chiropractic manipulative treatment, 1-2 spinal regions | 93 | 15 | $26 |
In context: peer comparison
Among 3 peers in this city , average services per provider: 536. This provider delivers 1.1× the peer median.Frequently asked questions
What is Dr. John Riordan's medical specialty?
Dr. John Riordan practices Chiropractor in Warrensburg, MO.
Where does Dr. John Riordan practice?
Dr. John Riordan practices at 420 East Young Avenue, Warrensburg, MO 64093. Office phone: 6604227246.
What is Dr. John Riordan's NPI?
Dr. John Riordan's National Provider Identifier (NPI) is 1558490524, issued by NPPES.
Does Dr. John Riordan accept Medicare assignment?
Yes. Dr. John Riordan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Riordan commonly perform?
Top Medicare-reported procedures in 2023: Chiropractic manipulative treatment, 3-4 spinal regions (HCPCS 98941); Chiropractic manipulative treatment, 1-2 spinal regions (HCPCS 98940). Source: CMS Medicare Physician & Other Practitioners file.