Care built on time, trust,
and expertise

Internal Medicine & Primary
Care in Phoenix & Scottsdale, AZ

We Work With Your Insurance. And Without It

We accept most major insurance plans. No insurance? No problem. We offer straightforward self-pay options

Welcome to
Phoenix Internal Medicine

Dr. Marella and Siripurapu have been caring for adults in the Phoenix & Scottsdale area since 2007. Board-certified internists who take the time to actually know you, your history, your concerns, and your goals. From chronic disease management to wellness, it's comprehensive care under one roof.

Comprehensive Medical Care & Wellness Services

Primary Care

Chronic & Complex Care

Preventive & Wellness

Hormones & Medication

Lab Work, Done Here.
Results, Faster.

Skip the extra trips and delays. Blood work is done right here in our office, so you can get answers faster without scheduling a separate lab visit across town.

Our Team

Dr. Punnaiah Marella, MD

Dr. Shantipriya Siripurapu, MD

Our Team at Phoenix Internal Medicine

Dr. Marella and Dr. Siripurapu have been caring for Phoenix patients since 2007, long before personalized medicine was a buzzword. Both are board-certified by the American Board of Internal Medicine. Both speak Telugu alongside English, a meaningful distinction in one of the most culturally diverse cities in the country. Since 2014, they've run a practice where complex conditions get real answers, chronic diseases get managed, and patients don't get rushed out the door.

Supportive Care for Common & Complex Conditions

Illness, Respiratory & Pain

Mental, Energy & Sleep Health

Heart & Metabolic Health

Hormonal & Men’s/Women’s Health

Why Choose
Phoenix Internal Medicine

Prevention + evidence-based chronic disease management in one practice

Evaluation of overlapping symptoms to support accurate diagnosis and treatment plans

Medication management with careful review and monitoring especially for patients on multiple prescriptions

Blood work done in-office for diagnostic testing, wellness labs, and ongoing monitoring

Coordinated specialty care with referrals and communication support across your care team

Prevention + evidence-based chronic disease management in one practice

Evaluation of overlapping symptoms to support accurate diagnosis and treatment plans

Medication management with careful review and monitoring especially for patients on multiple prescriptions

Blood work done in-office for diagnostic testing, wellness labs, and ongoing monitoring

Coordinated specialty care with referrals and communication support across your care team

Our Testimonials from patients

Thank you to Phoenix Internal Medicine. Getting things done with precision and care. Nice team that is patient and understanding. Office is always clean. Hannah and Riley are nice and show concern to my medical situation.

— David K.

Literally one of the best healthcare experiences. The staff was sweet, friendly, and beautiful, and they made me feel so comfortable. I was seen exactly at my appointment time by the second! My first time here and they are like family now. When I was checking out, an assistant even stopped her lunch to assist me. ❤️🫶

— Brinn C.

I had a wonderful experience. The physician assistant, Samantha, was excellent; she took the time to listen and asked insightful questions to uncover the root cause of my problem. She made me feel comfortable and relaxed while speaking with her. She is very knowledgeable and attentive

— Sarah G.

My first visit with Dr. Marella was very good. The time and attention to my medical history was welcome. I’m confident that remaining with this practice is the right decision for me. Reviewing lab results with PA Petrovic has been very informative. Generous time was given for my questions and reviewing meds. The entire staff is always warmly welcoming.

— Jeffrey G.

I love this drs. Office. They are very thorough and always available. I normally see Juliana, the PA and she is amazing. The front office is awesome as well. Charlie is in the upfront office and she is on top of things. I feel like this doctor’s office really cares about my health.

— Tamea S.

This was my first visit to my new doctor's office and it was a wonderful experience. They were professional , friendly and helpful.

— Mary L.

I had my first visit as a new patient and they were extremely thorough and very friendly. I am looking forward to a long relationship.

— Marcia L.

Locations & Contact

Camelback & 101

Old Town Scottsdale

Ready to Get Started?

Internal Medicine & Primary care works best when it’s consistent, proactive, and built around you.

Internal Medicine & Primary Care in Phoenix & Scottsdale, AZ