Doctor profile · Federal record
Dr. Mark Tieman, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Commack, NY
- NPI 1154494003
- Accepts Medicare
- 40 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
356 Veterans Memorial Hwy
Commack, NY 117254332
(631) 858-0400
fax (631) 543-2785 - Mailing address
-
34 Copperdale Ln
Huntington, NY 117432523
Credentials & registration
- NPI registered
- November 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1986 — 40 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- New York #179172
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1154494003. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
646
Distinct HCPCS
5
Medicare allowed
$85,056
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 235 | 40 | $105 | |
99442 |
Telephone medical discussion with physician, 11-20 minutes | 157 | 43 | $105 | |
99443 |
Telephone medical discussion with physician, 21-30 minutes | 115 | 38 | $147 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 101 | 34 | $148 | |
99483 |
Assessment of and care planning for patient with impaired thought processing, typically 60 minutes | 38 | 38 | $315 |
In context: peer comparison
Among 10 peers in Commack Internal Medicine Physician, average services per provider: 580. This provider delivers 1.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
97
Patients
0
Total drug cost
$1,595
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Alprazolam | Generic | 42 | 0 | $376 |
| Oxycodone Hcl | Generic | 23 | 0 | $132 |
| Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) | Brand | 21 | 0 | $187 |
| Nebivolol Hcl | Generic | 11 | 0 | $900 |
Frequently asked questions
What is Dr. Mark Tieman's medical specialty?
Dr. Mark Tieman practices Internal Medicine Physician in Commack, NY.
Where does Dr. Mark Tieman practice?
Dr. Mark Tieman practices at 356 Veterans Memorial Hwy, Commack, NY 117254332. Office phone: 6318580400.
What is Dr. Mark Tieman's NPI?
Dr. Mark Tieman's National Provider Identifier (NPI) is 1154494003, issued by NPPES.
Does Dr. Mark Tieman accept Medicare assignment?
Yes. Dr. Mark Tieman accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Tieman commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Telephone medical discussion with physician (HCPCS 99442); Telephone medical discussion with physician (HCPCS 99443). Source: CMS Medicare Physician & Other Practitioners file.