DR. THIRI S DEMARS (M.D., M.P.H. (C)) – Family Medicine Physician, NPI 1235525510
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,488 FAMILY PRACTICE in MD
Provider Addresses for DR. THIRI S DEMARS (M.D., M.P.H. (C))
110 Hospital Rd Ste And111
Prince Frederick, MD 206784019
Phone: (410) 535-4488
Fax: (443) 771-8114
Type: Location
100 N ACADEMY AVE
DANVILLE, PA 178224903
Phone: (570) 271-6144
Fax: (570) 271-6578
Type: Mailing
148 NEWBERRY PKWY
ETTERS, PA 173198968
Phone: (717) 938-0120
Fax: (717) 938-0124
Type: Location
100 HOSPITAL RD
PRINCE FREDERICK, MD 206784017
Phone: (410) 414-4791
Type: Mailing
14090 HG TRUEMAN RD STE 2100
SOLOMONS, MD 206883151
Phone: (410) 394-3712
Fax: (410) 394-3714
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2022-01-19
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20220119001461 | I | Family Practice | MD | TBD |
| I20220119002086 | I | Family Practice | DC | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 80 | 80 | $0 |
| 87804 | Detection test by immunoassay with direct visual observation for influenza virus | 44 | 22 | $0 |
| 87426 | Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus | 42 | 42 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 23 | 23 | $0 |
| 81003 | Automated urinalysis test | 21 | 21 | $0 |
Insurance plans in this area (ZIP 20678)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | TN | |
| Internal Medicine | VA | |
| Hospitalist, Internal Medicine, Internal Medicine | MD | |
| Internal Medicine | MA | |
| Physician Assistant | VA | |
| Hospitalist, Internal Medicine | MD | |
| Physician Assistant | MD | |
| Nurse Practitioner | NV | |
| Hospitalist, Internal Medicine, Internal Medicine | NY | |
| Internal Medicine, Hospitalist | NY |
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