Doctor profile · Federal record
Dr. John Oppenheimer, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Sag Harbor, NY
- NPI 1659364214
- Accepts Medicare
- 45 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
60 Bay St
Sag Harbor, NY 119633106
(631) 725-4600
fax (631) 725-6073 - Mailing address
-
Po Box 3137
Sag Harbor, NY 119630405
Credentials & registration
- NPI registered
- August 2005 — 21 yrs on file
- Profile last updated
- August 21, 2009
- Year of graduation
- 1981 — 45 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- New York #150853
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1659364214. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
770
Distinct HCPCS
8
Medicare allowed
$67,656
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 268 | 134 | $76 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 130 | 129 | $159 | |
90662 |
Influenza vaccine split virus, preservative free | 105 | 105 | $52 | |
G0008 |
Administration of influenza virus vaccine | 102 | 102 | $24 | |
G0009 |
Administration of pneumococcal vaccine | 54 | 54 | $24 | |
90677 |
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | 53 | 53 | $245 | |
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 35 | 29 | $49 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 23 | 22 | $114 |
In context: peer comparison
Among 1 peers in Sag Harbor Internal Medicine Physician, average services per provider: 96. This provider delivers 8.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,436
Patients
400
Total drug cost
$103,930
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 256 | 72 | $4,018 |
| Levothyroxine Sodium | Generic | 137 | 35 | $2,564 |
| Montelukast Sodium | Generic | 127 | 35 | $2,177 |
| Amlodipine Besylate | Generic | 123 | 36 | $1,568 |
| Losartan Potassium | Generic | 122 | 34 | $2,322 |
| Escitalopram Oxalate | Generic | 105 | 27 | $2,234 |
| Rosuvastatin Calcium | Generic | 90 | 24 | $2,157 |
| Gabapentin | Generic | 74 | 18 | $1,825 |
| Trazodone Hcl | Generic | 67 | 22 | $1,081 |
| Metoprolol Succinate | Generic | 60 | 23 | $1,103 |
Frequently asked questions
What is Dr. John Oppenheimer's medical specialty?
Dr. John Oppenheimer practices Internal Medicine Physician in Sag Harbor, NY.
Where does Dr. John Oppenheimer practice?
Dr. John Oppenheimer practices at 60 Bay St, Sag Harbor, NY 119633106. Office phone: 6317254600.
What is Dr. John Oppenheimer's NPI?
Dr. John Oppenheimer's National Provider Identifier (NPI) is 1659364214, issued by NPPES.
Does Dr. John Oppenheimer accept Medicare assignment?
Yes. Dr. John Oppenheimer accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Oppenheimer commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99215); Influenza vaccine split virus, preservative free (HCPCS 90662). Source: CMS Medicare Physician & Other Practitioners file.