Rachel Chacko Tiemann, MPAS, PA-C
- Medicare patients, 2024
- 171
- Part D claims, 2024
- 134
- MIPS score, 2024
- 94
- Industry payments
- $438
- Affiliated sites
- 1
- Practice address
- 18800 Main St, Huntington Beach, CA 92648
- Practice phone
- Call (714) 961-9119
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Z Dermatology & Skin Wellness Center
Huntington Beach, California
Find Rachel Tiemann'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.
Rachel Chacko Tiemann is a physician assistant in Huntington Beach, California
Rachel Tiemann practices at Z Dermatology & Skin Wellness Center in Huntington Beach, California.
Rachel Tiemann's NPI, 1417376005, was assigned on April 10, 2014. Rachel Tiemann holds Tennessee license 5335.
- NPI
- 1417376005NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1355657149
- NPI enumeration date
- April 10, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 961-9119
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Rachel Chacko Tiemann practices at Z Dermatology & Skin Wellness Center in Huntington Beach, California
Rachel Tiemann's primary practice is Z Dermatology & Skin Wellness Center, at 18800 Main St, Huntington Beach, CA 92648 in Orange County. The practice phone is (714) 961-9119.
- Z Dermatology & Skin Wellness Center18800 Main St, Huntington Beach, CA 92648 · Orange CountyPhone(714) 961-9119
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Rachel Chacko Tiemann is affiliated with 2 sites of care and 1 medical group
Rachel Tiemann's primary practice is Z Dermatology & Skin Wellness Center in Huntington Beach, California. The medical group on file is REN Dermatology & Aesthetics. Dmand AI also links Rachel Tiemann to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Rachel Chacko Tiemann's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Rachel Tiemann practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Z Dermatology & Skin Wellness Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Rachel Chacko Tiemann is one of 11,482 physician assistants in California
Physician assistant is Rachel Tiemann's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Rachel Tiemann is licensed in Tennessee.
Specialties and state licenses
- Physician assistant, TennesseePrimary
Physician assistants near Rachel Tiemann
Counts of physician assistants 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
Rachel Chacko Tiemann treated 171 Medicare patients in 2024, average age 73
CMS counts 171 Medicare patients who saw Rachel Tiemann in 2024. The largest group is 65 to 74, with 111 patients. 67% of them have high cholesterol, and 58% have high blood pressure. Their average risk score is 0.68, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Rachel Tiemann's median patient age at 44, with 67% women.
Rachel Tiemann's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Rachel Tiemann's Medicare patients by sex, 2024
- Women11064%
- Men6136%
Chronic conditions among Rachel Tiemann's Medicare patients, 2024
- High cholesterol67%
- High blood pressure58%
- Arthritis42%
- Ischemic heart disease26%
- Anxiety17%
- Osteoporosis16%
- Cancer15%
- Diabetes15%
Share of Medicare patients with each condition. A patient can have several.
Rachel Tiemann's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women67%
- Men32%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Rachel Chacko Tiemann wrote 134 Medicare Part D claims in 2024
In 2024, Rachel Tiemann wrote 134 Medicare Part D claims for 73 patients. 93% of them were for generic drugs.
Rachel Tiemann's Part D claims by kind of drug, 2024
- Generic124 claims93%
- Brand-name and other10 claims7%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Rachel Chacko Tiemann scored 94 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 94 out of 100 for Rachel Tiemann for performance year 2024, reported as part of a group. Rachel Tiemann accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Rachel Tiemann's MIPS scores, performance year 2024
- 94of 100Final score
- 88.4of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Rachel Chacko Tiemann received $438 in industry payments in 2025
CMS Open Payments shows 30 general payments to Rachel Tiemann from 14 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Sun Pharmaceutical Industries Inc. paid the most, $68.
Companies that paid Rachel Tiemann the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Rachel Chacko Tiemann'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 DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Rachel Chacko Tiemann
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Rachel Chacko Tiemann's NPI number?
Rachel Chacko Tiemann's NPI number is 1417376005. It was assigned on April 10, 2014, and it is active in the NPI Registry.
What does Rachel Chacko Tiemann specialize in?
Rachel Chacko Tiemann is a physician assistant in Huntington Beach, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Rachel Chacko Tiemann practice?
Rachel Tiemann practices at 18800 Main St, Huntington Beach, CA 92648. Rachel Tiemann's primary practice is Z Dermatology & Skin Wellness Center in Huntington Beach, California. Dmand AI also links Rachel Tiemann to 1 group practice or clinic.
What is Rachel Chacko Tiemann's office phone number?
The practice phone on file for Rachel Tiemann is (714) 961-9119.
What is Rachel Chacko Tiemann's medical license number?
Rachel Tiemann holds Tennessee license 5335.
What medical group is Rachel Chacko Tiemann part of?
Rachel Tiemann is linked to REN Dermatology & Aesthetics.
Does Rachel Chacko Tiemann accept Medicare?
Yes. CMS lists Rachel Tiemann as accepting Medicare assignment.
What is Rachel Chacko Tiemann's MIPS score?
Rachel Tiemann's MIPS final score for performance year 2024 is 94 out of 100, reported as part of a group.
How many Medicare patients does Rachel Chacko Tiemann see?
CMS counts 171 Medicare patients who saw Rachel Tiemann in 2024, with an average age of 73.
Has Rachel Chacko Tiemann received payments from drug or device companies?
CMS Open Payments shows $438 in general payments to Rachel Tiemann from 14 companies from 2025 to 2025. The largest total came from Sun Pharmaceutical Industries Inc.
How long has Rachel Chacko Tiemann been practicing?
Rachel Tiemann graduated from medical school in 2012, 14 years ago.
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