National Provider Identifier
Cassandra Williams, MD
Cassandra Williams, MD is listed in the NPPES registry with a primary specialty of Internal Medicine Physician in Amherst, NY and a listed phone number of (716) 309-4772.
Source: public NPPES record, last updated October 30, 2020. This profile is informational and is not medical advice, a quality rating, or a provider recommendation.
Profile Overview
- NPI
- 1558546820
- Provider Type
- Individual
- Primary Specialty
- Internal Medicine Physician
- Enumeration Date
- January 07, 2008
- Last Updated
- October 30, 2020
Practice Location
- 3980A Sheridan Dr Ste 200
- Amherst, NY 14226-1741
Phone: (716) 309-4772
Mailing Address
- PO Box 488
- Buffalo, NY 14240-0488
Specialties
- Internal Medicine Physician (207R00000X)
- Internal Medicine Physician (207R00000X)
Browse Similar Providers
See more Internal Medicine providers in Buffalo, NY.
Medicare Part B Activity
Reported 811 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 79th percentile for Medicare service volume.
Higher volume than most peers.
Performs 123% more Medicare services than the peer median.
Higher than 527 of 665 peers.
- Activity Percentile
- 79.2%
- Rank by Services
- 138 of 665
- Total Services
- 811
- Est. Allowed Value
- $90,788.39
- Dataset Year
- 2023
- Drug Code Share
- 0.0%
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.
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
- 99309: Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes
625 services | $63,564.66
- 99306: Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes
129 services | $22,211.92
- 99308: Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes
24 services | $1,709.28
- 99316: Nursing facility discharge management, more than 30 minutes
18 services | $2,214.00
- 99497: Advance care planning, first 30 minutes
15 services | $1,088.53
Full Record
- NPI
- 1558546820
- Entity Type
- Individual
- Last Name
- Williams
- First Name
- Cassandra
- Credential
- MD
- Provider Other Last Name
- Williams
- Provider Other First Name
- Cassandra
- Provider Other Middle Name
- Evans
- Provider Other Credential Text
- MD
- Provider Other Last Name Type Code
- 1
- Mailing Street Address
- PO Box 488
- Mailing City
- Buffalo
- Mailing State
- NY
- Mailing ZIP Code
- 14240-0488
- Mailing Country
- US
- Mailing Phone
- (866) 853-9551
- Practice Street Address
- 3980A Sheridan Dr Ste 200
- Practice City
- Amherst
- Practice State
- NY
- Practice ZIP Code
- 14226-1741
- Practice Country
- US
- Practice Phone
- (716) 309-4772
- Enumeration Date
- January 07, 2008
- Last Updated
- October 30, 2020
- Sex
- Female
- Sole Proprietor
- No
- Certification Date
- October 30, 2020
- updated_by_file
- npidata_pfile_20050523-20260308.csv
- Taxonomies
- Internal Medicine Physician (207R00000X), Internal Medicine Physician (207R00000X)
- Other Identifiers
- 06012940 (NY), N0002C (SC), 5909659 (NC)