Doctor profile · Federal record
Dr. Larissa Allen, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Internal Medicine Physician · Tucson, AZ
- NPI 1659536480
- Accepts Medicare
- MIPS 10.9 / 100 · 2023
- 18 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
6130 N la Cholla Blvd, Suite 200
Tucson, AZ 857413557
(520) 219-8342
fax (520) 219-7117
Credentials & registration
- NPI registered
- July 2008 — 18 yrs on file
- Profile last updated
- January 5, 2017
- Year of graduation
- 2008 — 18 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (2)
- Arizona #48787 · Arizona #R70554
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1659536480. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,188
Distinct HCPCS
10
Medicare allowed
$161,306
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 180 | 179 | $239 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 165 | 135 | $124 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 161 | 139 | $87 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 160 | 159 | $117 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 137 | 136 | $104 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 99 | 99 | $108 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 86 | 86 | $159 | |
91065 |
Measurement of hydrogen in breath to test for stomach and bowel symptoms | 65 | 46 | $81 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 40 | 40 | $169 | |
43249 |
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm | 34 | 33 | $140 |
In context: peer comparison
Among 17 peers in Tucson Gastroenterology Physician, average services per provider: 72. This provider delivers 17× the peer median.Open Payments
Industry payments received
All-time total
$1,093
Transactions
51
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 16 | $326.30 | |
| Celgene Corporation | 13 | $168.77 | |
| Pfizer INC. | 4 | $86.46 | |
| Regeneron Healthcare Solutions, INC. | 2 | $65.66 | |
| Intercept Pharmaceuticals, INC. | 3 | $53.59 | |
| Genzyme Corporation | 2 | $51.40 | |
| Takeda Pharmaceuticals U.S.A., INC. | 1 | $46.22 | |
| Celltrion USA INC. | 1 | $45.40 | |
| Janssen Biotech, INC. | 2 | $43.15 | |
| Ardelyx, INC. | 2 | $39.86 | |
| Phathom Pharmaceuticals, INC. | 1 | $34.18 | |
| Madrigal Pharmaceuticals | 1 | $32.82 | |
| Qol Medical, LLC | 1 | $31.22 | |
| Biocon Biologics INC | 1 | $23.04 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 1 | $15.63 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,521
Patients
846
Total drug cost
$1,075,604
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 331 | 114 | $4,939 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 315 | 312 | $24,404 |
| Pantoprazole Sodium | Generic | 275 | 97 | $3,851 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 138 | 137 | $2,177 |
| Famotidine | Generic | 80 | 34 | $1,064 |
| Sucralfate | Generic | 80 | 48 | $2,047 |
| Dicyclomine Hcl | Generic | 74 | 29 | $1,581 |
| Clenpiq (Sod Picosulf/Mag Ox/Citric Ac) | Brand | 36 | 36 | $6,394 |
| Lactulose | Generic | 31 | 0 | $1,033 |
| Stelara (Ustekinumab) | Brand | 29 | 0 | $788,062 |
Hospital affiliations
Frequently asked questions
What is Dr. Larissa Allen's medical specialty?
Dr. Larissa Allen practices Gastroenterology Physician in Tucson, AZ.
Where does Dr. Larissa Allen practice?
Dr. Larissa Allen practices at 6130 N la Cholla Blvd, Tucson, AZ 857413557. Office phone: 5202198342.
What is Dr. Larissa Allen's NPI?
Dr. Larissa Allen's National Provider Identifier (NPI) is 1659536480, issued by NPPES.
Does Dr. Larissa Allen accept Medicare assignment?
Yes. Dr. Larissa Allen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Larissa Allen commonly perform?
Top Medicare-reported procedures in 2023: Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.