Doctor profile · Federal record
Dr. Calvin Parker, M.D.
Internal Medicine Physician (CMS: Gastroenterology) · Internal Medicine Physician · Baltimore, MD
- NPI 1073654976
- MIPS 84.8 / 100 · 2023
- 22 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1838 Greene Tree RD, Suite 400
Baltimore, MD 212086391
(410) 602-7782
fax (410) 602-2438
Credentials & registration
- NPI registered
- February 2007 — 19 yrs on file
- Profile last updated
- March 9, 2022
- Year of graduation
- 2004 — 22 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State licenses (2)
- Maryland #D81266 · Georgia #057556
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1073654976. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
972
Distinct HCPCS
10
Medicare allowed
$139,198
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99204 |
New patient office or other outpatient visit, 45-59 minutes | 291 | 291 | $175 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 119 | 105 | $131 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 111 | 102 | $81 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 101 | 99 | $136 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 74 | 74 | $115 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 47 | 47 | $160 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 44 | 44 | $260 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 36 | 28 | $95 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 34 | 33 | $52 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 31 | 31 | $170 |
In context: peer comparison
Among 363 peers in Baltimore Internal Medicine Physician, average services per provider: 105. This provider delivers 9.3× the peer median.Open Payments
Industry payments received
All-time total
$1,342
Transactions
66
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 24 | $427.91 | |
| Janssen Biotech, INC. | 18 | $268.68 | |
| Genzyme Corporation | 5 | $115.42 | |
| Ipsen Biopharmaceuticals, INC | 3 | $69.18 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 3 | $61.95 | |
| Lilly USA, LLC | 2 | $42.10 | |
| Celgene Corporation | 2 | $37.44 | |
| Celltrion USA INC. | 2 | $29.78 | |
| Pfizer INC. | 1 | $24.18 | |
| Regeneron Healthcare Solutions, INC. | 1 | $22.51 | |
| Fresenius Kabi USA, LLC | 1 | $21.76 | |
| Ardelyx, INC. | 1 | $20.72 | |
| Intercept Pharmaceuticals, INC. | 1 | $18.89 | |
| Sumitomo Pharma America, INC. | 1 | $18.75 | |
| Aimmune Therapeutics, INC. | 1 | $17.41 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
317
Patients
129
Total drug cost
$22,392
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 135 | 46 | $1,671 |
| Dicyclomine Hcl | Generic | 40 | 0 | $378 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 36 | 35 | $569 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 32 | 31 | $2,654 |
| Famotidine | Generic | 17 | 0 | $160 |
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 17 | 17 | $408 |
| Ondansetron Hcl | Generic | 15 | 0 | $155 |
| Linzess (Linaclotide) | Brand | 13 | 0 | $16,049 |
| Hydrocortisone | Generic | 12 | 0 | $347 |
Hospital affiliations
Frequently asked questions
What is Dr. Calvin Parker's medical specialty?
Dr. Calvin Parker practices Internal Medicine Physician in Baltimore, MD.
Where does Dr. Calvin Parker practice?
Dr. Calvin Parker practices at 1838 Greene Tree RD, Baltimore, MD 212086391. Office phone: 4106027782.
What is Dr. Calvin Parker's NPI?
Dr. Calvin Parker's National Provider Identifier (NPI) is 1073654976, issued by NPPES.
Does Dr. Calvin Parker accept Medicare assignment?
Dr. Calvin Parker does not accept Medicare assignment for all services. Patients may be billed amounts beyond Medicare-allowed charges.
What procedures does Dr. Calvin Parker commonly perform?
Top Medicare-reported procedures in 2023: New patient office or other outpatient visit (HCPCS 99204); Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.