Mark Su, M.D.
NPI 1609871946 · Family Medicine Physician · Newburyport, MA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Su, M.D. is a Family Medicine Physician provider in Newburyport, MA (NPI 1609871946).
Provider details
- NPI number
- 1609871946
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 216973 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
750 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 304 | $128 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 174 | $178 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 127 | $88 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 67 | $131 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 65 | $19 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 59 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 76 | 19 |
| Oxycodone Hcl | 72 | — |
| Gabapentin | 59 | — |
| Fluconazole | 59 | 21 |
| Clonazepam | 48 | — |
| Dextroamphetamine/Amphetaminebrand: Dextroamphetamine-Amphetamine | 38 | — |
| Sertraline Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,460 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 65 Newburyport TpkeNewbury, MA 01951-1113Phone: (978) 465-9770Fax: (978) 465-9004
- 255 Low St Ste 202Newburyport, MA 01950Phone: (978) 225-0378
Registry dates
- Enumerated
- 2005-06-14
- Last updated
- 2019-10-11
Frequently asked questions
- What is Mark Su's NPI number?
- Mark Su's National Provider Identifier (NPI) is 1609871946, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Su's specialty?
- Mark Su is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Su located?
- Mark Su's practice location on file with NPPES is 255 Low St Ste 202, Newburyport, MA 01950.
- What is Mark Su's phone number?
- The practice phone number listed in the NPPES registry for Mark Su is (978) 225-0378.
- Does Mark Su accept Medicare?
- Mark Su is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Su's NPI active?
- Yes — Mark Su's NPI (1609871946) is active in the NPPES registry as of the last update on 2019-10-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.