Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Seija Maniskas, MD, MS

Individual provider Colon & Rectal Surgery Physician · NPI 1861015729

Seija Maniskas, MD, MS is a Colorectal Surgery (Proctology) in Upland, California. Qualified in 2020, 6 years ago. Works from 2 locations. Licensed in California.

Years since qualifying
6
Licensed in
CA
In the registry since
2020
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MS — Master of Science
A graduate science degree.

See every abbreviation used in this directory →

Practice location Address checks out

1100 San Bernardino Rd Ste 1100
Upland, CA 91786-4952
Phone: (909) 949-2242
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 320 W 6th St, Corona, CA 92882-3349 — (951) 898-2828

Specialties & licences

Colon & Rectal Surgery Physician (primary) Taxonomy 208C00000X · Licence A187429 (CA)

Record details

NPI number1861015729
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , MS
Sole proprietorNo
NPI enumeratedMay 26, 2020
Last updated in NPPESAugust 5, 2026
Certification dateAugust 5, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCOLORECTAL SURGERY (PROCTOLOGY)
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Accepts Medicare assignment Not indicated
Practice locations3 on file with Medicare

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