Costner Mckenzie, MD
Costner Mckenzie, MD is a Dermatology Physician in New York, NY, registered under NPI 1003361171.
Getting there
Here is what surrounds this office in New York, based on OpenStreetMap data collected Sep 21, 2026. Parking is available about 0.33 mi away at Loeb Boathouse Parking Lot. There is EV charging 0.42 mi from the office (ChargePoint) — useful if you are driving in from out of town. The nearest transit stop is 581 ft away, served by Lexington Avenue & East 77th Street. A pharmacy sits 0.33 mi from the entrance (Value Price Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 671 ft away.
Getting here and what is nearby
Coffee Café Carlyle 262 ft ~1 min
Hotel The Carlyle 290 ft ~2 min
Transit Madison Avenue & East 75th Street 449 ft ~2 min
Transit Madison Avenue & East 77th Street 525 ft ~2 min
Coffee The SisterYard 502 ft ~2 min
Hotel The Surrey 537 ft ~3 min
Restaurant Cafe Boulud 526 ft ~2 min
Transit Lexington Avenue & East 77th Street 581 ft ~3 min
Hotel The Mark 601 ft ~3 min
Grocery D'Agostino 572 ft ~3 min
Lexington Avenue
Restaurant Dunkin' 634 ft ~3 min
Coffee Starbucks 671 ft ~3 min
Convenience Marche Madison 704 ft ~3 min
931 Madison Avenue
Pharmacy Duane Reade 664 ft ~3 min
1091 Lexington Avenue, 10075
00:00-24:00 open "Store" || Mo-Fr 08:00-20:00; Sa 09:00-18:00; Su 10:00-17:00 open "Pharmacy"
Restaurant Tamam Falafel 668 ft ~3 min
Convenience Freedom Market 774 ft ~3 min
Pharmacy Eisler Chemists 1,010 ft ~4 min
1142 Lexington Avenue, 10075
Mo-Fr 09:00-19:00; Sa 09:00-17:00
Grocery Gristedes 0.23 mi ~5 min
1365 3rd Avenue, 10075
Mo-Sa 06:00-24:00; Su 07:00-23:00
Convenience East Side Smoke Shop 0.26 mi ~6 min
1390 3rd Avenue, 10075
Parking Metropolitan Museum 0.29 mi ~6 min
Grocery Morton Williams 0.30 mi ~6 min
Parking 0.31 mi ~7 min
Parking Loeb Boathouse Parking Lot 0.33 mi ~7 min
Pharmacy Value Price Pharmacy 0.33 mi ~7 min
1475 2nd Avenue
Mo-Fr 08:30-20:00; Sa 09:00-18:00; Su 10:00-17:00
EV charging ChargePoint 0.38 mi ~8 min
EV charging ChargePoint 0.42 mi ~9 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 323540 | NY | Dermatology Physician primary |
This provider holds licence 323540 issued in NY. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Dermatology
- PAC ID
- 7810310463
- Enrollment ID
- I20240808001816
Medicare enrolment is recorded as approved under the provider type Practitioner - Dermatology. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Dermatology covers
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging. NUCC Health Care Provider Taxonomy, code 207N00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003361171 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 18, 2016 |
| Last updated | Mar 20, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
69 E 76TH ST New York, NY 10021 (800) 778-3090 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 3 | 6 | 1 | 1 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 6 | 2 | 1 | 5 |
Sum = 49 · next multiple of 10 = 50 · check digit = 1 · actual last digit = 1
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.