DR. JESSICA RENEE WAS M.D.
NPI 1255565859
Anesthesiology in Ann Arbor, MI
NPI Status: Active since May 11, 2009
Contact Information
2215 FULLER RD
ANN ARBOR, MI
ZIP 48105
Phone: (734) 769-7100
- Individual
- Female
- Anesthesiology
- PECOS Enrolled
About JESSICA WAS
This page provides the complete NPI Profile along with additional information for Jessica Was, an anesthesiologist established in Ann Arbor, Michigan with a medical specialization in Anesthesiology. The healthcare provider is registered in the NPI registry with number 1255565859 assigned on May 2009. The practitioner's primary taxonomy code is 207L00000X with license number 4301113727 (MI). The provider is registered as an individual and her NPI record was last updated March 2026.
- NPI
- 1255565859
- Provider Name
- DR. JESSICA RENEE WAS M.D.
- Other Name
- JESSICA RENEE PATTERSON MD
- Other Name Type
- Former Name (1)
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 2215 FULLER RD ANN ARBOR, MI 48105
- Location Phone
- (734) 769-7100
- Mailing Address
- 2215 FULLER RD ANN ARBOR, MI 48105
- Mailing Phone
- (734) 769-7100
- Is Sole Proprietor?
- No
- Enumeration Date
- 05-11-2009
- Last Update Date
- 03-19-2026
- Code Navigator
An anesthesiologist like Jessica Was manages the care of surgical patients and pain relief through drug administration that reduces or eliminates pain during an operation, medical procedure or during labor and delivery of babies. During surgical procedures anesthesiologists are responsible for adjusting the amount of anesthetic, monitoring the patient's heart rate, body temperature, blood pressure and breathing.
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Anesthesiology
- Taxonomy Code
- 207L00000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 4301113727
- License State
- MI
- Taxonomy Description
- An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 207L00000X | Allopathic & Osteopathic Physicians | Anesthesiology | A125744 (CA) |
| 2 | 207LC0200X | Allopathic & Osteopathic Physicians | Anesthesiology | 4301113727 (MI) |
| 3 | 207LC0200X | Allopathic & Osteopathic Physicians | Anesthesiology | A125744 (CA) |
Medicare Participation & PECOS Enrollment Status
Jessica Was is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Durable Medical Equipment (DME) and Power Mobility Devices.
What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.
Is the provider registered in PECOS? Yes
Eligible to Order or Refer Part B Clinical Laboratory and Imaging: No
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): No
Eligible to Order or Refer Power Mobility Devices: Yes
Areas of Expertise
The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.
Anesthesia for procedure on heart and large blood vessels
Critical care, first 30-74 minutes
Anesthesia for heart and large blood vessel procedures involves using medications to block sensation, ensuring you don't feel pain during surgery. It can be general (you're asleep) or regional (part of your body is numbed). It helps ensure comfort and safety throughout the operation.
This service was performed 12 times for 12 patientsCritical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
This service was performed 116 times for 22 patientsReviews for DR. JESSICA RENEE WAS M.D.
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1255565859, we treat the final digit (9) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 9).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 51 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
ANN ARBOR, MI 48105
ANN ARBOR, MI 48105
ANN ARBOR, MI 48105
ANN ARBOR, MI 48105
ANN ARBOR, MI 48105
ANN ARBOR, MI 48105
ANN ARBOR, MI 48105
ANN ARBOR, MI 48105
ANN ARBOR, MI 48105
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1255565859, enumerated as an "individual" on May 11, 2009.
The provider is located at 2215 FULLER RD ANN ARBOR, MI 48105 and the phone number is (734) 769-7100.
Anesthesiology with taxonomy code 207L00000X.
