Doctor profile · Federal record
Dr. Mark Duncan, MD
Family Medicine Physician (CMS: Family Practice) · Family Medicine Physician · Freeland, WA
- NPI 1598713919
- Accepts Medicare
- MIPS 88.2 / 100 · 2023
- 31 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
5577 Vanbarr Pl
Freeland, WA 982499555
(360) 331-3343 - Mailing address
-
Po Box 935
Freeland, WA 982490935
Credentials & registration
- NPI registered
- May 2006 — 20 yrs on file
- Profile last updated
- April 25, 2023
- Year of graduation
- 1995 — 31 yrs since
- Specialty taxonomy
- 207Q00000X — NUCC code
- State licenses (2)
- Washington #60305379 · Georgia #045063
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1598713919. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
194
Distinct HCPCS
4
Medicare allowed
$22,497
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 107 | 85 | $115 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 43 | 38 | $84 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 22 | 21 | $170 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 22 | 22 | $129 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 48. This provider delivers 4.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,432
Patients
458
Total drug cost
$23,260
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 219 | 71 | $3,775 |
| Losartan Potassium | Generic | 160 | 46 | $2,628 |
| Lisinopril | Generic | 156 | 54 | $1,843 |
| Levothyroxine Sodium | Generic | 100 | 36 | $2,142 |
| Metformin Hcl | Generic | 93 | 29 | $998 |
| Tamsulosin Hcl | Generic | 93 | 30 | $1,902 |
| Amlodipine Besylate | Generic | 85 | 26 | $930 |
| Metoprolol Succinate | Generic | 85 | 26 | $2,096 |
| Omeprazole | Generic | 81 | 26 | $1,416 |
| Hydrochlorothiazide | Generic | 72 | 23 | $415 |
Frequently asked questions
What is Dr. Mark Duncan's medical specialty?
Dr. Mark Duncan practices Family Medicine Physician in Freeland, WA.
Where does Dr. Mark Duncan practice?
Dr. Mark Duncan practices at 5577 Vanbarr Pl, Freeland, WA 982499555. Office phone: 3603313343.
What is Dr. Mark Duncan's NPI?
Dr. Mark Duncan's National Provider Identifier (NPI) is 1598713919, issued by NPPES.
Does Dr. Mark Duncan accept Medicare assignment?
Yes. Dr. Mark Duncan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Duncan 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); Established patient office or other outpatient visit (HCPCS 99215). Source: CMS Medicare Physician & Other Practitioners file.