Doctor profile · Federal record
Dr. Michael Chase, MD
Internal Medicine Physician (CMS: Internal Medicine) · Sausalito, CA
- NPI 1457423105
- 54 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
3 Harbor Dr Ste 111
Sausalito, CA 949651491
(415) 683-2988
fax (415) 683-2980
Credentials & registration
- NPI registered
- November 2006 — 20 yrs on file
- Profile last updated
- October 27, 2025
- Year of graduation
- 1972 — 54 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #G25829
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1457423105. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
632
Distinct HCPCS
9
Medicare allowed
$75,364
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 266 | 179 | $144 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 196 | 171 | $103 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 52 | 52 | $147 | |
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 46 | 45 | $66 | |
90662 |
Influenza vaccine split virus, preservative free | 16 | 16 | $72 | |
G0008 |
Administration of influenza virus vaccine | 16 | 16 | $37 | |
99443 |
Telephone medical discussion with physician, 21-30 minutes | 14 | 12 | $144 | |
81002 |
Urinalysis, manual test | 13 | 12 | $3 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 13 | 11 | $201 |
In context: peer comparison
Among 1 peers in Sausalito Internal Medicine Physician, average services per provider: 70. This provider delivers 9.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,822
Patients
739
Total drug cost
$30,038
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 421 | 161 | $6,270 |
| Levothyroxine Sodium | Generic | 283 | 109 | $4,885 |
| Lisinopril | Generic | 161 | 76 | $1,616 |
| Losartan Potassium | Generic | 132 | 50 | $2,134 |
| Amlodipine Besylate | Generic | 122 | 49 | $1,149 |
| Metformin Hcl | Generic | 96 | 36 | $1,465 |
| Omeprazole | Generic | 92 | 41 | $1,894 |
| Hydrochlorothiazide | Generic | 88 | 36 | $536 |
| Rosuvastatin Calcium | Generic | 76 | 34 | $1,715 |
| Valacyclovir (Valacyclovir Hcl) | Brand | 73 | 27 | $3,087 |
Frequently asked questions
What is Dr. Michael Chase's medical specialty?
Dr. Michael Chase practices Internal Medicine Physician in Sausalito, CA.
Where does Dr. Michael Chase practice?
Dr. Michael Chase practices at 3 Harbor Dr Ste 111, Sausalito, CA 949651491. Office phone: 4156832988.
What is Dr. Michael Chase's NPI?
Dr. Michael Chase's National Provider Identifier (NPI) is 1457423105, issued by NPPES.
Does Dr. Michael Chase accept Medicare assignment?
Dr. Michael Chase does not accept Medicare assignment for all services. Patients may be billed amounts beyond Medicare-allowed charges.
What procedures does Dr. Michael Chase commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439). Source: CMS Medicare Physician & Other Practitioners file.