Doctor profile · Federal record
Dr. Mary Johnston, DC
Chiropractor (CMS: Chiropractic) · Oceanside, NY
- NPI 1902965395
- Accepts Medicare
- 38 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
222 Merrick RD
Oceanside, NY 115721429
(516) 623-3195
fax (516) 623-1077
Credentials & registration
- NPI registered
- December 2006 — 20 yrs on file
- Profile last updated
- March 6, 2020
- Year of graduation
- 1988 — 38 yrs since
- Specialty taxonomy
- 111N00000X — NUCC code
- State license (1)
- New York #X005570
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1902965395. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,117
Distinct HCPCS
1
Medicare allowed
$34,769
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
98940 |
Chiropractic manipulative treatment, 1-2 spinal regions | 1,117 | 68 | $31 |
In context: peer comparison
Among 3 peers in Oceanside Chiropractor, average services per provider: 809. This provider delivers 1.4× the peer median.Frequently asked questions
What is Dr. Mary Johnston's medical specialty?
Dr. Mary Johnston practices Chiropractor in Oceanside, NY.
Where does Dr. Mary Johnston practice?
Dr. Mary Johnston practices at 222 Merrick RD, Oceanside, NY 115721429. Office phone: 5166233195.
What is Dr. Mary Johnston's NPI?
Dr. Mary Johnston's National Provider Identifier (NPI) is 1902965395, issued by NPPES.
Does Dr. Mary Johnston accept Medicare assignment?
Yes. Dr. Mary Johnston accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mary Johnston commonly perform?
Top Medicare-reported procedures in 2023: Chiropractic manipulative treatment, 1-2 spinal regions (HCPCS 98940). Source: CMS Medicare Physician & Other Practitioners file.