J Psychiatr Pract
Clinical DeteriorationEarly Medical InterventionEmergency Services, Psychiatric
Dr. Ryan Michael Greytak, MD
NPI1750604617PAC ID4082863394
- Medicare services, 2016
- 73
- Part D claims, 2021
- 61
- Publications
- 1
- Industry payments
- $1,567
- Insurance carriers
- 2
- Practice address
- 200 W Santa Ana Blvd, Santa Ana, CA 92701
- Practice phone
- Call (714) 834-5610
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cys Crisis Assessment Team
Santa Ana, California
Find Dr. Greytak's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Ryan Michael Greytak is a psychiatrist in Santa Ana, California
Dr. Greytak practices at Cys Crisis Assessment Team in Santa Ana, California.
Dr. Greytak's NPI, 1750604617, was assigned on March 8, 2010. Dr. Greytak graduated from University of Pittsburgh School of Medicine in 2009. Dr. Greytak holds California license A126390.
NPI and contact details
- NPI
- 1750604617NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4082863394
- NPI enumeration date
- March 8, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (714) 834-5610
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ryan Michael Greytak practices at Cys Crisis Assessment Team in Santa Ana, California
Dr. Greytak's primary practice is Cys Crisis Assessment Team, at 200 W Santa Ana Blvd, Santa Ana, CA 92701 in Orange County. The practice phone is (714) 834-5610.
- Cys Crisis Assessment Team200 W Santa Ana Blvd, Santa Ana, CA 92701 · Orange CountyPhone(714) 834-5610
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ryan Michael Greytak is affiliated with 1 site of care
Dr. Greytak's primary practice is Cys Crisis Assessment Team in Santa Ana, California.
Cys Crisis Assessment TeamPrimary
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Ryan Michael Greytak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greytak practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cys Crisis Assessment Team | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Ryan Michael Greytak is one of 6,803 psychiatrists in California
Psychiatry is Dr. Greytak's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Greytak is board certified in geriatric psychiatry by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Greytak's licenses on file in 2 states: California and Pennsylvania.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
- Pennsylvania license
Psychiatrists near Dr. Greytak
Counts of psychiatrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Ryan Michael Greytak billed Medicare for 73 services in 2016
CMS data shows 73 Medicare services from Dr. Greytak across 2 procedure codes in 2016. Medicare paid $6,797 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 201673
Paid by Medicare$6,797
Procedure codes2
Dr. Greytak compared with the California median for psychiatrists, 2016
- Dr. Greytak
- California median
- Medicare services
- 73vs 11939% below
- Part D claims
- 61vs 14458% below
Medians across 6,809 psychiatrists in California with Dmand AI profiles that report each measure.
Dr. Greytak's most billed Medicare procedure codes, 2016
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Greytak?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Greytak and other psychiatrists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ryan Michael Greytak's patients have a median age of 26
Across all payers, Dmand AI patient panel data puts Dr. Greytak's median patient age at 26, with 50% women.
Dr. Greytak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 26
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Ryan Michael Greytak wrote 61 Medicare Part D claims in 2021
In 2021, Dr. Greytak wrote 61 Medicare Part D claims. Every claim was for a generic drug. They cover 3 drugs, with $3,162 in total drug cost. In 2020, CMS named 22 claims across 2 drugs.
Part D claims, 202161
Drugs named by CMS3
Total drug cost$3,162
Dr. Greytak's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 222021: 61177%
Drugs named by CMS: 3 in 2021, 2 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. Ryan Michael Greytak offers telehealth to Medicare patients
Dr. Greytak accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Greytak as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ryan Michael Greytak has 1 publication on record
Dmand AI links 1 paper to Dr. Greytak. Dr. Greytak's most frequent co-author is Geetha Jayaram, MD.
Papers1
Dr. Greytak's most frequent co-authors
Recent publications by Dr. Greytak
See who Dr. Greytak researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Greytak works with, so you can find a warm path to the right psychiatrists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Ryan Michael Greytak received $1,567 in industry payments from 2016 to 2024
CMS Open Payments shows 63 general payments to Dr. Greytak from 6 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Alkermes, Inc. paid the most, $460.
General payments to Dr. Greytak by program year, 2016 to 2024
General payments to Dr. Greytak by kind, 2016 to 2024
$1.6Kin total
- Food and beverage$1,565100%
- Gifts$20%
Companies that paid Dr. Greytak the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ryan Michael Greytak graduated from University of Pittsburgh School of Medicine
Dr. Greytak graduated from University of Pittsburgh School of Medicine in 2009.
- Medical school
- Board certified in geriatric psychiatry
- Board certified in psychiatry
Source: Dmand AI Professional Profile Data
Dr. Ryan Michael Greytak accepts plans from 2 insurance carriers
Dr. Greytak is in network with 2 carriers, including Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Massachusetts
- HCSC
Plan types Dr. Greytak accepts, by number of carriers
- Medicare2
- PPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Ryan Michael Greytak's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Ryan Michael Greytak
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Ryan Michael Greytak's NPI number?
Dr. Ryan Michael Greytak's NPI number is 1750604617. It was assigned on March 8, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Ryan Michael Greytak?
Dr. Ryan Michael Greytak is a psychiatrist in Santa Ana, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Ryan Michael Greytak practice?
Dr. Greytak practices at 200 W Santa Ana Blvd, Santa Ana, CA 92701. Dr. Greytak's primary practice is Cys Crisis Assessment Team in Santa Ana, California.
What is Dr. Ryan Michael Greytak's office phone number?
The practice phone on file for Dr. Greytak is (714) 834-5610.
What is Dr. Ryan Michael Greytak's medical license number?
Dr. Greytak holds California license A126390, one of the licenses on file in 2 states.
Which states has Dr. Ryan Michael Greytak been licensed in?
Dmand AI has state licenses on file for Dr. Greytak in California (2013 to 2026) and Pennsylvania (2009 to 2010).
Does Dr. Ryan Michael Greytak accept Medicare?
Yes. CMS data shows Dr. Greytak billed Medicare for 73 services in 2016, and Dr. Greytak accepts Medicare assignment.
Does Dr. Ryan Michael Greytak offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Greytak as offering telehealth services.
Is Dr. Ryan Michael Greytak board certified?
Yes. Dr. Greytak is board certified in geriatric psychiatry by the American Board of Psychiatry and Neurology.
What services does Dr. Ryan Michael Greytak bill to Medicare?
In 2016, Dr. Greytak's most billed Medicare services were nursing facility care (99306) and nursing facility care (99309).
Show 7 more questionsShow fewer questions
Where did Dr. Ryan Michael Greytak go to medical school?
Dr. Greytak graduated from University of Pittsburgh School of Medicine in 2009.
What drugs does Dr. Ryan Michael Greytak prescribe most?
In 2021 Medicare Part D data, Dr. Greytak's most prescribed drugs by claims were Chlorpromazine HCl, Amlodipine Besylate and Lisinopril.
Has Dr. Ryan Michael Greytak received payments from drug or device companies?
CMS Open Payments shows $1,567 in general payments to Dr. Greytak from 6 companies from 2016 to 2024. The largest total came from Alkermes, Inc.
How long has Dr. Ryan Michael Greytak been practicing?
Dr. Greytak graduated from medical school in 2009, 17 years ago.
Does Dr. Ryan Michael Greytak do research?
Dmand AI links 1 publication to Dr. Greytak.
Who does Dr. Ryan Michael Greytak publish with?
Dr. Greytak's most frequent co-authors are Geetha Jayaram, MD (1 shared paper).
What insurance does Dr. Ryan Michael Greytak accept?
Dr. Greytak is in network with 2 carriers, including Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
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