Skip to main content
Informational

Your experience at our Optum NY location is important to us:

Need assistance or have concerns? The Optum leadership team is here to help.

Health care

We provide affordable and personalized care

How can we help?

Helpful links

Financial

Accounts to help you save and pay for health care expenses

How can we help?

Helpful links

  • Resources

    Find contribution limits, savings tools, calculators and eligible expenses

  • Account support

    Find contact information and frequently asked questions

Tax season resources

Get ready for HSA tax season

If you used an HSA this year, the HSA Tax Center offers general information about contributions, eligible expenses and commonly used tax forms — all in one place.

Pharmacy

We make it easy to get medications you need, when and where you need them

How can we help?

Helpful links

  • Optum Rx

    For people with pharmacy insurance benefits through Optum Rx

  • Track orders

    Track your home delivery and specialty order

  • Pharmacy support

    Find contact information and answers to frequently asked questions

Mobile app

Optum Rx on the go

Request refills, track order status, manage billing information and much more.

Download on the App StoreGet it on Google Play
Steven K. Grundfast, MD, FCCP

Steven K. Grundfast, MD, FCCP

Specialty

Pulmonary Disease

Languages

English

Seeing patients at

Monday 7:00 AM - 7:15 PM
Tuesday 7:00 AM - 7:15 PM
Wednesday 7:00 AM - 7:15 PM
Thursday 7:00 AM - 7:15 PM
Friday 7:00 AM - 7:00 PM
Saturday 7:30 AM - 2:00 PM
Sunday Closed
Hours may vary, please contact to schedule and confirm appointment availability.

Patient Reviews

Patient review summary

Learn about our survey

5

4

3

2

1

4.8

34 reviews

  • Apr 19, 2026
    Verified Review

    Dr Grundfast has excellent communication with me and is extremely knowledgeable. He cares about how i am doing on medications and cares about my overall health

  • Apr 18, 2026
    Verified Review

    Dr. is good.

  • Apr 5, 2026
    Verified Review

    Professional and personable

  • Apr 3, 2026
    Verified Review

    Very understanding and listens when I talked

  • Mar 29, 2026
    Verified Review

    I was very impressed by how thorough, professional, and patient-friendly Dr Grundfast was during my entire appointment. I actually recommended him on Nextdoor to a neighbor that was looking for a Pulmonologist.

  • Mar 5, 2026
    Verified Review

    I like him for the care he is giving to my mom.

  • Mar 3, 2026
    Verified Review

    He took the time to answer all my questions

  • Feb 27, 2026
    Verified Review

    straight forward advice. Very efficient visits.

  • Jan 30, 2026
    Verified Review

    He is a fantastic Healthcare provider

  • Jan 22, 2026
    Verified Review

    X

  • Jan 19, 2026
    Verified Review

    Compassionate care, attention to details, calm and attentive. Good listener and answer questions with respect and understanding.

  • Jan 14, 2026
    Verified Review

    Dr. Grundfast is professional and has a very pleasant personality. He makes me feel comfortable with any questions I have for him. I like that he is knowledgeable about the care he provides

  • Jan 3, 2026
    Verified Review

    I felt heard by him

  • Dec 19, 2025
    Verified Review

    He has explained my particular situation very thoroughly, and professionally

  • Dec 2, 2025
    Verified Review

    He always listens to my concerns, addresses and issues or problems. He has a very positive attitude, which is very reassuring.

  • Nov 26, 2025
    Verified Review

    Easy to talk too. Made me feel listened too and relaxed . I trusted him. He answered all my questions.

  • Nov 25, 2025
    Verified Review

    He provided exceptional assistance and guided me through my medication management with great care and professionalism.

  • Nov 15, 2025
    Verified Review

    Great doctor

  • Nov 7, 2025
    Verified Review

    Neutral rating because I have seen him once and he ordered a test so care is yet to come. I have no complaints, just can't give an opinion

  • Oct 17, 2025
    Verified Review

    Well informed , answered questions, guided me in the right direction a few years ago!!!

Page 1 of 2
  • About Steven K. Grundfast, MD, FCCP

    Dr. Steven K. Grundfast is an internist caring for adult patients. He supports preventive health and treatment of ongoing medical conditions.

    Philosophy of care

    Dr. Grundfast values long term patient relationships and informed care.

    Gender

    Male

    Licenses

    NY, 210221

    Network Name

    Crystal Run Healthcare

    NPI

    1710971049

  • Insurance Accepted

    This list is for informational purposes only and may not reflect the most current plans accepted by the provider. Optum accepts most major health insurance plans. Please contact your insurance company to confirm your coverage, eligibility, and the provider's participation in your plan.

    • AARP
    • Aetna
    • Anthem/BCBS
    • CDPHP
    • Cigna
    • Emblem
    • FDNY/WTC911
    • HealthFirst
    • Humana
    • MVP
    • Magnacare
    • MedicaidNY/Medicare
    • Molina
    • Multiplan
    • NYSHIP
    • Northwell
    • Oscar
    • Oxford
    • Tricare
    • UHC
    • Univera
    • VA/CHAMPVA
  • Medical School

    • Hahnemann Medical College

    Residency

    • Crozer-Chester Medical Center

  • Awards and Publications