Doctor profile · Federal record
Dr. Nidia Messias, MD
Anatomic Pathology & Clinical Pathology Physician (CMS: Pathology) · Anatomic Pathology Physician · Saint Louis, MO
- NPI 1881896041
- Accepts Medicare
- MIPS 79.3 / 100 · 2023
- 27 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1 Barnes Jewish Hospital Plz, Div PA Anatomic and Molecular Path
Saint Louis, MO 631101003
(314) 362-5641
fax (314) 362-0369 - Mailing address
-
Po Box 7412011
Chicago, IL 606742011
Credentials & registration
- NPI registered
- June 2007 — 19 yrs on file
- Profile last updated
- April 17, 2025
- Year of graduation
- 1999 — 27 yrs since
- Specialty taxonomy
- 207ZP0102X — NUCC code
- State license (1)
- Missouri #2010026538
- Medicaid
- MO #200099808
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1881896041. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,383
Distinct HCPCS
10
Medicare allowed
$58,494
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
88350 |
Antibody evaluation, each additional single antibody stain procedure | 515 | 54 | $28 | |
88313 |
Special stained specimen slides to examine tissue including interpretation and report | 186 | 55 | $12 | |
88305 |
Pathology examination of tissue using a microscope, intermediate complexity | 141 | 104 | $36 | |
88307 |
Pathology examination of tissue using a microscope, moderately high complexity | 133 | 90 | $80 | |
88342 |
Special stained specimen slides to examine tissue, initial procedure | 72 | 65 | $34 | |
G0416 |
Surgical pathology, gross and microscopic examinations, for prostate needle biopsy, any method | 60 | 60 | $173 | |
88346 |
Antibody evaluation, initial single antibody stain procedure | 59 | 54 | $35 | |
88348 |
Electron microscopy for diagnosis | 58 | 53 | $75 | |
88341 |
Special stained specimen slides to examine tissue, each additional procedure | 54 | 21 | $28 | |
88300 |
Pathology examination of tissue using a microscope, limited examination | 32 | 31 | $4 |
In context: peer comparison
Among 41 peers in Saint Louis Anatomic Pathology & Clinical Pathology Physician, average services per provider: 137. This provider delivers 10× the peer median.Open Payments
Industry payments received
All-time total
$271
Transactions
2
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Travere Therapeutics, INC. | 1 | $145.59 | |
| Genzyme Corporation | 1 | $125.04 |
By nature of payment
Hospital affiliations
Frequently asked questions
What is Dr. Nidia Messias's medical specialty?
Dr. Nidia Messias practices Anatomic Pathology & Clinical Pathology Physician in Saint Louis, MO.
Where does Dr. Nidia Messias practice?
Dr. Nidia Messias practices at 1 Barnes Jewish Hospital Plz, Saint Louis, MO 631101003. Office phone: 3143625641.
What is Dr. Nidia Messias's NPI?
Dr. Nidia Messias's National Provider Identifier (NPI) is 1881896041, issued by NPPES.
Does Dr. Nidia Messias accept Medicare assignment?
Yes. Dr. Nidia Messias accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Nidia Messias commonly perform?
Top Medicare-reported procedures in 2023: Antibody evaluation, each additional single antibody stain procedure (HCPCS 88350); Special stained specimen slides to examine tissue including interpretation and report (HCPCS 88313); Pathology examination of tissue using a microscope, intermediate complexity (HCPCS 88305). Source: CMS Medicare Physician & Other Practitioners file.