Doctor profile · Federal record
Dr. David Grunkemeier, MD
Gastroenterology Physician (CMS: Gastroenterology) · Portland, OR
- NPI 1972542090
- Accepts Medicare
- 26 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
9701 Sw Barnes RD, Suite #300
Portland, OR 972256589
(503) 297-8081
fax (503) 292-6601 - Mailing address
-
541 Ne 20Th Ave Ste 225
Portland, OR 972322895
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- November 18, 2024
- Year of graduation
- 2000 — 26 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Oregon #MD23842
- Medicaid (2)
- OR #006116 · WA #8402478
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1972542090. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
500
Distinct HCPCS
8
Medicare allowed
$50,760
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
88305 |
Pathology examination of tissue using a microscope, intermediate complexity | 218 | 102 | $37 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 63 | 62 | $250 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 60 | 60 | $128 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 58 | 52 | $131 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 44 | 43 | $92 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 30 | 30 | $89 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 14 | 13 | $183 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 13 | 13 | $174 |
In context: peer comparison
Among 45 peers in Portland Gastroenterology Physician, average services per provider: 59. This provider delivers 8.5× the peer median.Open Payments
Industry payments received
All-time total
$30
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| CapsoVision, INC. | 1 | $30.00 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
545
Patients
229
Total drug cost
$561,517
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 133 | 46 | $2,857 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 55 | 53 | $1,163 |
| Mesalamine | Generic | 46 | 13 | $31,610 |
| Sutab (Sod Sulf/Pot Chloride/Mag Sulf) | Brand | 41 | 39 | $7,025 |
| Ondansetron Odt (Ondansetron) | Brand | 40 | 39 | $419 |
| Pantoprazole Sodium | Generic | 40 | 0 | $539 |
| Humira(Cf) Pen (Adalimumab) | Brand | 34 | 0 | $317,503 |
| Dicyclomine Hcl | Generic | 33 | 0 | $1,025 |
| Ondansetron Hcl | Generic | 31 | 20 | $239 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 19 | 19 | $1,439 |
Hospital affiliations
Frequently asked questions
What is Dr. David Grunkemeier's medical specialty?
Dr. David Grunkemeier practices Gastroenterology Physician in Portland, OR.
Where does Dr. David Grunkemeier practice?
Dr. David Grunkemeier practices at 9701 Sw Barnes RD, Portland, OR 972256589. Office phone: 5032978081.
What is Dr. David Grunkemeier's NPI?
Dr. David Grunkemeier's National Provider Identifier (NPI) is 1972542090, issued by NPPES.
Does Dr. David Grunkemeier accept Medicare assignment?
Yes. Dr. David Grunkemeier accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. David Grunkemeier commonly perform?
Top Medicare-reported procedures in 2023: Pathology examination of tissue using a microscope, intermediate complexity (HCPCS 88305); Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); Biopsy of large bowel using a flexible endoscope (HCPCS 45380). Source: CMS Medicare Physician & Other Practitioners file.