Doctor profile · Federal record
Dr. Marlon Decastro, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Internal Medicine Physician · Santa Rosa, CA
- NPI 1780643270
- Accepts Medicare
- 29 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
500 Doyle Park Dr, Ste. 303
Santa Rosa, CA 954054558
(707) 303-8300
fax (707) 303-8301
Credentials & registration
- NPI registered
- March 2006 — 20 yrs on file
- Profile last updated
- March 7, 2023
- Year of graduation
- 1997 — 29 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State licenses (2)
- California #C53594 · South Carolina #23181
- Medicaid
- SC #231813
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1780643270. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,546
Distinct HCPCS
10
Medicare allowed
$195,975
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J0897 |
Injection, denosumab, 1 mg | 1,200 | 12 | $23 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 660 | 358 | $138 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 180 | 139 | $193 | |
G0008 |
Administration of influenza virus vaccine | 103 | 100 | $29 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 102 | 90 | $99 | |
90694 |
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage | 94 | 94 | $76 | |
G0180 |
Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and | 33 | 30 | $58 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 32 | 32 | $180 | |
81002 |
Urinalysis, manual test | 30 | 27 | $3 | |
96372 |
Injection of drug or substance under skin or into muscle | 25 | 14 | $16 |
In context: peer comparison
Among 19 peers in this city , average services per provider: 173. This provider delivers 15× the peer median.Open Payments
Industry payments received
All-time total
$277
Transactions
17
Manufacturers
6
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| PFIZER INC. | 11 | $149.57 | |
| Amgen Inc. | 2 | $51.09 | |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 1 | $22.87 | |
| GlaxoSmithKline, LLC. | 1 | $18.72 | |
| AstraZeneca Pharmaceuticals LP | 1 | $17.73 | |
| iRhythm Technologies, Inc. | 1 | $16.92 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
3,323
Patients
957
Total drug cost
$71,300
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 615 | 184 | $13,506 |
| Levothyroxine Sodium | Generic | 366 | 94 | $7,538 |
| Amlodipine Besylate | Generic | 227 | 69 | $2,863 |
| Lisinopril | Generic | 227 | 65 | $3,780 |
| Pantoprazole Sodium | Generic | 227 | 74 | $4,094 |
| Metformin Hcl | Generic | 209 | 56 | $2,418 |
| Gabapentin | Generic | 205 | 56 | $5,139 |
| Losartan Potassium | Generic | 199 | 57 | $3,123 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 192 | 36 | $4,244 |
| Potassium Chloride | Generic | 166 | 55 | $6,940 |
Frequently asked questions
What is Dr. Marlon Decastro's medical specialty?
Dr. Marlon Decastro practices Internal Medicine Physician in Santa Rosa, CA.
Where does Dr. Marlon Decastro practice?
Dr. Marlon Decastro practices at 500 Doyle Park Dr, Santa Rosa, CA 954054558. Office phone: 7073038300.
What is Dr. Marlon Decastro's NPI?
Dr. Marlon Decastro's National Provider Identifier (NPI) is 1780643270, issued by NPPES.
Does Dr. Marlon Decastro accept Medicare assignment?
Yes. Dr. Marlon Decastro accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Marlon Decastro commonly perform?
Top Medicare-reported procedures in 2023: Injection, denosumab, 1 mg (HCPCS J0897); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99215). Source: CMS Medicare Physician & Other Practitioners file.