National Provider Identifier
Mary Margaret Oneil, MD
Mary Margaret Oneil, MD is listed in the NPPES registry with a primary specialty of Rheumatology Physician in Cheektowaga, NY and a listed phone number of (716) 898-0755.
Source: public NPPES record, last updated October 11, 2022. This profile is informational and is not medical advice, a quality rating, or a provider recommendation.
Profile Overview
- NPI
- 1598790818
- Provider Type
- Individual
- Primary Specialty
- Rheumatology Physician
- Enumeration Date
- July 12, 2006
- Last Updated
- October 11, 2022
Practice Location
- 2355 Union RD Ste 100
- Cheektowaga, NY 14227-2234
Phone: (716) 898-0755
Specialties
- Rheumatology Physician (207RR0500X)
Browse Similar Providers
See more Rheumatology providers in Buffalo, NY.
Medicare Part B Activity
Reported 2,366 Medicare fee-for-service service lines in 2023.
Peer comparison
Compared to Internal Medicine providers in the Buffalo, NY metro area.
This provider is in the 92nd percentile for Medicare service volume.
Among the highest-volume peers.
Performs 552% more Medicare services than the peer median.
Higher than 615 of 665 peers.
- Activity Percentile
- 92.5%
- Rank by Services
- 50 of 665
- Total Services
- 2,366
- Est. Allowed Value
- $105,650.10
- Dataset Year
- 2023
- Drug Code Share
- 69.7%
Estimated allowed value reflects Medicare fee-for-service allowed amounts only. It does not include Medicare Advantage, commercial insurance, cash-pay services, or employment compensation.
Peers are grouped by the broader Internal Medicine classification rather than the exact subspecialty label shown elsewhere on the page.
Drug-related HCPCS codes make up 69.7% of reported Medicare services, so the claim mix is dominated by administered-drug billing lines.
Percentile distribution
Each bar represents a 10-point percentile band of peers by total Medicare services for Internal Medicine across the Buffalo, NY metro area. Taller bars indicate higher service-volume bands. Highlighted bar marks this provider's percentile band.
Observed service range: 11 to 91,321 total Medicare services.
Top Clinical Services
- 99214: Established patient office or other outpatient visit, 30-39 minutes
307 services | $36,245.96
- 96413: Administration of chemotherapy into vein, 1 hour or less
109 services | $11,717.61
- 99213: Established patient office or other outpatient visit, 20-29 minutes
106 services | $8,778.68
- 96372: Injection of drug or substance under skin or into muscle
95 services | $1,232.55
- 99215: Established patient office or other outpatient visit, 40-54 minutes
40 services | $6,259.32
Common Drug-Related Codes
- J0897: Injection, denosumab, 1 mg
1,440 services | $33,380.70
- J1040: Injection, methylprednisolone acetate, 80 mg
189 services | $2,116.33
- J3489: Injection, zoledronic acid, 1 mg
20 services | $165.70
Full Record
- NPI
- 1598790818
- Entity Type
- Individual
- Last Name
- Oneil
- First Name
- Mary
- Middle Name
- Margaret
- Credential
- MD
- Mailing Street Address
- 2355 Union RD Ste 100
- Mailing City
- Cheektowaga
- Mailing State
- NY
- Mailing ZIP Code
- 14227-2234
- Mailing Country
- US
- Mailing Phone
- (716) 898-0755
- Mailing Fax
- (716) 898-0775
- Practice Street Address
- 2355 Union RD Ste 100
- Practice City
- Cheektowaga
- Practice State
- NY
- Practice ZIP Code
- 14227-2234
- Practice Country
- US
- Practice Phone
- (716) 898-0755
- Practice Fax
- (716) 898-0775
- Enumeration Date
- July 12, 2006
- Last Updated
- October 11, 2022
- Sex
- Female
- Sole Proprietor
- No
- Certification Date
- October 11, 2022
- updated_by_file
- npidata_pfile_20050523-20260308.csv
- Taxonomies
- Rheumatology Physician (207RR0500X)
- Other Identifiers
- 01316201 (NY)