Malcolm Mackenzie, M.D.
NPI 1578650610 · Obstetrics & Gynecology Physician · Lexington, MA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Malcolm Mackenzie, M.D. is a Obstetrics & Gynecology Physician provider in Lexington, MA (NPI 1578650610).
Provider details
- NPI number
- 1578650610
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 9604 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Diazepam | 68 |
| Hydromorphone Hcl | 62 |
| Baclofen | 41 |
| Fluconazole | 24 |
| Estradiol | 17 |
| Ondansetron Hcl | 13 |
| Ibuprofen | 12 |
| Ketorolac Tromethamine | 12 |
| Cyclobenzaprine Hcl | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,072 across 3 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
Registry dates
- Enumerated
- 2006-10-09
- Last updated
- 2009-04-28
Frequently asked questions
- What is Malcolm Mackenzie's NPI number?
- Malcolm Mackenzie's National Provider Identifier (NPI) is 1578650610, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Malcolm Mackenzie's specialty?
- Malcolm Mackenzie is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Malcolm Mackenzie located?
- Malcolm Mackenzie's practice location on file with NPPES is 57 Bedford St, Lexington, MA 02420-4500.
- What is Malcolm Mackenzie's phone number?
- The practice phone number listed in the NPPES registry for Malcolm Mackenzie is (603) 847-3404.
- Does Malcolm Mackenzie accept Medicare?
- Malcolm Mackenzie is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Malcolm Mackenzie's NPI active?
- Yes — Malcolm Mackenzie's NPI (1578650610) is active in the NPPES registry as of the last update on 2009-04-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.