Dr. Marianne Elizabeth Chai, MD
- Part D claims, 2024
- 558
- Hospital affiliations
- 1
- Industry payments
- $26
- Medical group
- 1
- State license
- 1
- Practice address
- 15230 Lakeshore Drive, Clearlake, CA 95422
- Practice phone
- Call (707) 994-0407
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Adventist Health Clear Lake - Clearlake
Rural Health Clinic - Hospital-Owned · Clearlake, California
Find Dr. Chai'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. Marianne Elizabeth Chai is a psychiatrist in Clearlake, California
Dr. Chai practices at Adventist Health Clear Lake - Clearlake in Clearlake, California.
Dr. Chai's NPI, 1821295577, was assigned on June 27, 2007. Dr. Chai graduated from University of Miami Leonard M. Miller School of Medicine in 2007. Dr. Chai holds New York license 63227.
- NPI
- 1821295577NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2567857691
- NPI enumeration date
- June 27, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 994-0407
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marianne Elizabeth Chai practices at Adventist Health Clear Lake - Clearlake in Clearlake, California
Dr. Chai's primary practice is Adventist Health Clear Lake - Clearlake, at 15230 Lakeshore Drive, Clearlake, CA 95422. The practice phone is (707) 994-0407.
- Adventist Health Clear Lake - Clearlake15230 Lakeshore Drive, Clearlake, CA 95422Phone(707) 994-0407
Source: Dmand AI Affiliation Data
Dr. Marianne Elizabeth Chai is affiliated with 2 sites of care and 1 medical group
Dr. Chai's primary practice is Adventist Health Clear Lake - Clearlake in Clearlake, California. Dr. Chai is also affiliated with Adventist Health Clear Lake. The medical group on file is Adventist Health Clear Lake.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Marianne Elizabeth Chai's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chai practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Adventist Health Clear Lake - Clearlake | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marianne Elizabeth Chai is one of 6,803 psychiatrists in California
Psychiatry is Dr. Chai's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Chai is licensed in New York.
Specialties and state licenses
- Psychiatry, New YorkPrimary
Psychiatrists near Dr. Chai
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. Marianne Elizabeth Chai's patients have a median age of 45
Across all payers, Dmand AI patient panel data puts Dr. Chai's median patient age at 45, with 73% women.
Dr. Chai's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 45
Patient panel by sex, all payers
- Women73%
- Men25%
Source: Dmand AI Patient Panel Data
Dr. Marianne Elizabeth Chai wrote 558 Medicare Part D claims in 2024
In 2024, Dr. Chai wrote 558 Medicare Part D claims for 49 patients. 89% of them were for generic drugs. CMS names the drug for 447 of them, across 20 drugs with 11 or more claims each, at $90,525 in total drug cost. In 2023, CMS named 104 claims across 7 drugs.
Dr. Chai's Part D claims by kind of drug, 2024
- Generic499 claims89%
- Brand-name59 claims11%
Dr. Chai's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Chai's Part D claims, 2024
- Antipsychotics, patients 65 and over7%39 of 558 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1042024: 447330%
Drugs named by CMS: 20 in 2024, 7 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Marianne Elizabeth Chai takes part in Medicare
Dr. Chai accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Marianne Elizabeth Chai received $26 in industry payments from 2017 to 2018
CMS Open Payments shows 2 general payments to Dr. Chai from 1 drug or device company from 2017 to 2018. Food and beverage make up the largest share, 100% of the total. Alkermes, Inc. paid the most, $26.
General payments to Dr. Chai by program year, 2017 to 2018
Companies that paid Dr. Chai the most, 2017 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Marianne Elizabeth Chai graduated from University of Miami Leonard M. Miller School of Medicine
Dr. Chai graduated from University of Miami Leonard M. Miller School of Medicine in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Marianne Elizabeth Chai'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| 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)Medicare Part D Prescribers - by Provider (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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Marianne Elizabeth Chai
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. Marianne Elizabeth Chai's NPI number?
Dr. Marianne Elizabeth Chai's NPI number is 1821295577. It was assigned on June 27, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Marianne Elizabeth Chai?
Dr. Marianne Elizabeth Chai is a psychiatrist in Clearlake, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Marianne Elizabeth Chai practice?
Dr. Chai practices at 15230 Lakeshore Drive, Clearlake, CA 95422. Dr. Chai's primary practice is Adventist Health Clear Lake - Clearlake in Clearlake, California.
What is Dr. Marianne Elizabeth Chai's office phone number?
The practice phone on file for Dr. Chai is (707) 994-0407.
What is Dr. Marianne Elizabeth Chai's medical license number?
Dr. Chai holds New York license 63227.
Which hospitals is Dr. Marianne Elizabeth Chai affiliated with?
Dr. Chai is affiliated with Adventist Health Clear Lake.
What medical group is Dr. Marianne Elizabeth Chai part of?
Dr. Chai is linked to Adventist Health Clear Lake.
Does Dr. Marianne Elizabeth Chai accept Medicare?
Yes. CMS lists Dr. Chai as accepting Medicare assignment.
Where did Dr. Marianne Elizabeth Chai go to medical school?
Dr. Chai graduated from University of Miami Leonard M. Miller School of Medicine in 2007.
What drugs does Dr. Marianne Elizabeth Chai prescribe most?
In 2024 Medicare Part D data, Dr. Chai's most prescribed drugs by claims were Buprenorphine-Naloxone, Quetiapine Fumarate and Duloxetine HCl.
Has Dr. Marianne Elizabeth Chai received payments from drug or device companies?
CMS Open Payments shows $26 in general payments to Dr. Chai from 1 company from 2017 to 2018. The largest total came from Alkermes, Inc.
How long has Dr. Marianne Elizabeth Chai been practicing?
Dr. Chai graduated from medical school in 2007, 19 years ago.
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