Joann M. Timberlake, PA
- Medicare services, 2023
- 217
- Part D claims, 2024
- 29
- MIPS score, 2024
- 85
- Hospital affiliations
- 3
- Industry payments
- $392
- Practice address
- 9920 Talbert Avenue, Fountain Valley, CA 92708
- Practice phone
- Call (714) 378-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Joann Timberlake'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.
Joann M. Timberlake is an emergency medicine physician in Fountain Valley, California
Joann Timberlake practices at Orange Coast Medical Center in Fountain Valley, California, part of MemorialCare Health System.
Joann Timberlake's NPI, 1043241094, was assigned on July 6, 2006. Joann Timberlake graduated from Loma Linda University School of Medicine in 2005. Joann Timberlake holds California license PA18228.
- NPI
- 1043241094NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6608870688
- NPI enumeration date
- July 6, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 378-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Joann M. Timberlake practices at Orange Coast Medical Center in Fountain Valley, California
Joann Timberlake's primary practice is Orange Coast Medical Center, at 9920 Talbert Avenue, Fountain Valley, CA 92708 in Orange County. The practice phone is (714) 378-7000.
- Orange Coast Medical Center9920 Talbert Avenue, Fountain Valley, CA 92708 · Orange CountyPhone(714) 378-7000
Source: Dmand AI Affiliation Data
Joann M. Timberlake is affiliated with 4 sites of care and 2 medical groups
Joann Timberlake's primary practice is Orange Coast Medical Center in Fountain Valley, California, part of MemorialCare Health System. Joann Timberlake is also affiliated with Long Beach Medical Center. The medical group on file is Memorial Radiation Oncology Medical Group. Dmand AI also links Joann Timberlake to 1 more hospital, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Joann M. Timberlake's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Joann Timberlake practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Orange Coast Medical Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Joann M. Timberlake is one of 7,423 emergency medicine physicians in California
Emergency medicine is Joann Timberlake's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Joann Timberlake is licensed in California.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
Emergency medicine physicians near Joann Timberlake
Counts of emergency medicine physicians 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
Joann M. Timberlake billed Medicare for 217 services in 2023
CMS data shows 217 Medicare services from Joann Timberlake across 1 procedure code in 2023, all of them office visits. Medicare paid $9,091 for them. Every service was in a facility, such as a hospital, rather than an office.
Joann Timberlake's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1202023: 21781%
Joann Timberlake compared with the California median for emergency medicine physicians, 2023
- Joann Timberlake
- California median
- Medicare services
- 217vs 26518% below
- Part D claims
- 16vs 6274% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Joann Timberlake's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Joann M. Timberlake's patients have a median age of 74
Across all payers, Dmand AI patient panel data puts Joann Timberlake's median patient age at 74, with 52% women.
Joann Timberlake's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women52%
- Men46%
Source: Dmand AI Patient Panel Data
Joann M. Timberlake wrote 29 Medicare Part D claims in 2024
In 2024, Joann Timberlake wrote 29 Medicare Part D claims for 20 patients. 93% of them were for generic drugs. CMS names the drug for 16 of them, across 1 drug with 11 or more claims each, at $229 in total drug cost. In 2023, CMS named 38 claims across 1 drug.
Joann Timberlake's Part D claims by kind of drug, 2024
- Generic27 claims93%
- Brand-name and other2 claims7%
Joann Timberlake'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 382024: 1658%
Drugs named by CMS: 1 in 2024, 1 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
Joann M. Timberlake scored 85 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 85 out of 100 for Joann Timberlake for performance year 2024, reported as part of a group. Joann Timberlake accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Joann Timberlake's MIPS scores, performance year 2024
- 85of 100Final score
- 69.8of 100Quality
- 40of 100Improvement Activities
- 76of 100Cost
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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Joann M. Timberlake received $392 in industry payments from 2021 to 2024
CMS Open Payments shows 8 general payments to Joann Timberlake from 5 drug and device companies from 2021 to 2024. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $164.
General payments to Joann Timberlake by program year, 2021 to 2024
Companies that paid Joann Timberlake the most, 2021 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Joann M. Timberlake graduated from Loma Linda University School of Medicine
Joann Timberlake graduated from Loma Linda University School of Medicine in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Joann M. Timberlake'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 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)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) |
| 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 Joann M. Timberlake
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Joann M. Timberlake's NPI number?
Joann M. Timberlake's NPI number is 1043241094. It was assigned on July 6, 2006, and it is active in the NPI Registry.
What does Joann M. Timberlake specialize in?
Joann M. Timberlake is an emergency medicine physician in Fountain Valley, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Joann M. Timberlake practice?
Joann Timberlake practices at 9920 Talbert Avenue, Fountain Valley, CA 92708. Joann Timberlake's primary practice is Orange Coast Medical Center in Fountain Valley, California, part of MemorialCare Health System. Dmand AI also links Joann Timberlake to 1 hospital, 1 group practice or clinic and 1 medical group.
What is Joann M. Timberlake's office phone number?
The practice phone on file for Joann Timberlake is (714) 378-7000.
What is Joann M. Timberlake's medical license number?
Joann Timberlake holds California license PA18228.
Which hospitals is Joann M. Timberlake affiliated with?
Joann Timberlake practices at Orange Coast Medical Center in Fountain Valley, California. Joann Timberlake is also affiliated with Long Beach Medical Center. Dmand AI links Joann Timberlake to 1 more hospital.
What medical group is Joann M. Timberlake part of?
Joann Timberlake is linked to Memorial Radiation Oncology Medical Group. Dmand AI links Joann Timberlake to 1 more medical group.
Does Joann M. Timberlake accept Medicare?
Yes. CMS data shows Joann Timberlake billed Medicare for 217 services in 2023, and Joann Timberlake accepts Medicare assignment.
What is Joann M. Timberlake's MIPS score?
Joann Timberlake's MIPS final score for performance year 2024 is 85 out of 100, reported as part of a group.
What services does Joann M. Timberlake bill to Medicare?
In 2023, Joann Timberlake's most billed Medicare services were office visit, established patient (99213).
Show 4 more questionsShow fewer questions
Where did Joann M. Timberlake go to medical school?
Joann Timberlake graduated from Loma Linda University School of Medicine in 2005.
What drugs does Joann M. Timberlake prescribe most?
In 2024 Medicare Part D data, Joann Timberlake's most prescribed drugs by claims were Tamsulosin HCl.
Has Joann M. Timberlake received payments from drug or device companies?
CMS Open Payments shows $392 in general payments to Joann Timberlake from 5 companies from 2021 to 2024. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Joann M. Timberlake been practicing?
Joann Timberlake graduated from medical school in 2005, 21 years ago.
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